./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:23:09,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:23:09,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:23:09,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:23:09,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:23:09,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:23:09,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:23:09,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:23:09,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:23:09,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:23:09,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:23:09,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:23:09,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:23:09,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:23:09,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:23:09,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:23:09,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:23:09,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:23:09,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:23:09,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:23:09,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:23:09,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:23:09,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:23:09,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:23:09,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:23:09,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:23:09,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:23:09,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:23:09,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:23:09,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:23:09,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:23:09,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:23:09,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:23:09,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:23:09,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:23:09,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:23:09,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:23:09,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:23:09,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:23:09,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:23:09,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:23:09,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 02:23:09,946 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:23:09,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:23:09,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:23:09,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:23:09,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:23:09,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:23:09,949 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:23:09,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:23:09,950 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:23:09,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:23:09,950 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:23:09,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:23:09,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:23:09,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:23:09,952 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:23:09,952 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:23:09,952 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:23:09,953 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:23:09,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:23:09,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:23:09,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:23:09,955 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:23:09,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:23:09,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:23:09,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:23:09,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:23:09,956 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:23:09,957 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:23:09,957 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:23:09,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:23:09,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:23:09,958 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:23:09,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:23:09,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:23:09,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:23:09,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:23:09,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:23:09,960 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:23:09,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:23:09,961 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:23:09,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:23:09,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:23:09,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2022-11-22 02:23:10,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:23:10,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:23:10,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:23:10,415 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:23:10,415 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:23:10,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-22 02:23:14,361 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:23:14,690 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:23:14,691 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-22 02:23:14,706 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data/9fed5d648/794407d775c848fd9da1b9dec51b76dd/FLAGdc5968ac7 [2022-11-22 02:23:14,739 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data/9fed5d648/794407d775c848fd9da1b9dec51b76dd [2022-11-22 02:23:14,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:23:14,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:23:14,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:23:14,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:23:14,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:23:14,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:23:14" (1/1) ... [2022-11-22 02:23:14,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77deb867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:14, skipping insertion in model container [2022-11-22 02:23:14,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:23:14" (1/1) ... [2022-11-22 02:23:14,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:23:14,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:23:15,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:23:15,301 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:23:15,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:23:15,431 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:23:15,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15 WrapperNode [2022-11-22 02:23:15,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:23:15,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:23:15,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:23:15,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:23:15,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,525 INFO L138 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2022-11-22 02:23:15,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:23:15,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:23:15,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:23:15,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:23:15,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,601 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:23:15,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:23:15,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:23:15,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:23:15,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (1/1) ... [2022-11-22 02:23:15,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:23:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:15,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:23:15,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:23:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:23:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-22 02:23:15,730 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-22 02:23:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:23:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:23:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:23:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:23:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:23:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:23:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:23:15,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:23:15,942 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:23:15,961 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:23:16,306 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:23:16,347 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:23:16,348 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:23:16,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:16 BoogieIcfgContainer [2022-11-22 02:23:16,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:23:16,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:23:16,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:23:16,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:23:16,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:23:14" (1/3) ... [2022-11-22 02:23:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e90893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:23:16, skipping insertion in model container [2022-11-22 02:23:16,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:23:15" (2/3) ... [2022-11-22 02:23:16,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e90893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:23:16, skipping insertion in model container [2022-11-22 02:23:16,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:16" (3/3) ... [2022-11-22 02:23:16,364 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2022-11-22 02:23:16,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:23:16,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-11-22 02:23:16,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:23:16,471 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;@44494721, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:23:16,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-22 02:23:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 59 states have internal predecessors, (66), 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) [2022-11-22 02:23:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:23:16,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:16,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:23:16,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash 136145128, now seen corresponding path program 1 times [2022-11-22 02:23:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:16,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591749290] [2022-11-22 02:23:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:16,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:17,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:17,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591749290] [2022-11-22 02:23:17,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591749290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:17,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:17,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:23:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685863408] [2022-11-22 02:23:17,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:17,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:17,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:17,136 INFO L87 Difference]: Start difference. First operand has 64 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 59 states have internal predecessors, (66), 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) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 02:23:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:17,347 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-11-22 02:23:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2022-11-22 02:23:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:17,364 INFO L225 Difference]: With dead ends: 128 [2022-11-22 02:23:17,364 INFO L226 Difference]: Without dead ends: 125 [2022-11-22 02:23:17,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:23:17,373 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 109 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:17,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 119 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-22 02:23:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 92. [2022-11-22 02:23:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 82 states have internal predecessors, (104), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-22 02:23:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2022-11-22 02:23:17,434 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 5 [2022-11-22 02:23:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:17,435 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2022-11-22 02:23:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 02:23:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2022-11-22 02:23:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:23:17,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:17,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:23:17,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:23:17,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash 136145129, now seen corresponding path program 1 times [2022-11-22 02:23:17,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452576158] [2022-11-22 02:23:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:17,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:17,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452576158] [2022-11-22 02:23:17,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452576158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:17,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:17,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:17,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899435433] [2022-11-22 02:23:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:23:17,789 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 02:23:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:18,032 INFO L93 Difference]: Finished difference Result 215 states and 295 transitions. [2022-11-22 02:23:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:23:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2022-11-22 02:23:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:18,043 INFO L225 Difference]: With dead ends: 215 [2022-11-22 02:23:18,044 INFO L226 Difference]: Without dead ends: 215 [2022-11-22 02:23:18,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:23:18,055 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 224 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:18,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 149 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-22 02:23:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2022-11-22 02:23:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 126 states have (on average 1.6904761904761905) internal successors, (213), 146 states have internal predecessors, (213), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-22 02:23:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 258 transitions. [2022-11-22 02:23:18,114 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 258 transitions. Word has length 5 [2022-11-22 02:23:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:18,114 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 258 transitions. [2022-11-22 02:23:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 02:23:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 258 transitions. [2022-11-22 02:23:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:23:18,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:18,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:23:18,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:23:18,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -74468347, now seen corresponding path program 1 times [2022-11-22 02:23:18,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:18,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783424569] [2022-11-22 02:23:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:18,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:18,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783424569] [2022-11-22 02:23:18,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783424569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:18,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:18,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:18,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871465829] [2022-11-22 02:23:18,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:18,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:18,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:18,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:23:18,423 INFO L87 Difference]: Start difference. First operand 164 states and 258 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-22 02:23:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:18,777 INFO L93 Difference]: Finished difference Result 253 states and 364 transitions. [2022-11-22 02:23:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2022-11-22 02:23:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:18,786 INFO L225 Difference]: With dead ends: 253 [2022-11-22 02:23:18,787 INFO L226 Difference]: Without dead ends: 253 [2022-11-22 02:23:18,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:23:18,797 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 146 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:18,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 169 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:23:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-22 02:23:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2022-11-22 02:23:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 129 states have (on average 1.6744186046511629) internal successors, (216), 149 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-22 02:23:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 261 transitions. [2022-11-22 02:23:18,846 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 261 transitions. Word has length 6 [2022-11-22 02:23:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:18,847 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 261 transitions. [2022-11-22 02:23:18,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-22 02:23:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 261 transitions. [2022-11-22 02:23:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:23:18,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:18,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:18,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:23:18,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1986448584, now seen corresponding path program 1 times [2022-11-22 02:23:18,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:18,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027286877] [2022-11-22 02:23:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:19,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:19,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027286877] [2022-11-22 02:23:19,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027286877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:19,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:19,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097040107] [2022-11-22 02:23:19,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:19,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:23:19,316 INFO L87 Difference]: Start difference. First operand 167 states and 261 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-22 02:23:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:19,520 INFO L93 Difference]: Finished difference Result 217 states and 296 transitions. [2022-11-22 02:23:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-22 02:23:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:19,524 INFO L225 Difference]: With dead ends: 217 [2022-11-22 02:23:19,524 INFO L226 Difference]: Without dead ends: 217 [2022-11-22 02:23:19,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:23:19,526 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 137 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:19,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 197 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:23:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-22 02:23:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2022-11-22 02:23:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 129 states have (on average 1.6589147286821706) internal successors, (214), 149 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-22 02:23:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2022-11-22 02:23:19,542 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 7 [2022-11-22 02:23:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:19,543 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2022-11-22 02:23:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-22 02:23:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2022-11-22 02:23:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:23:19,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:19,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:23:19,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1450364007, now seen corresponding path program 1 times [2022-11-22 02:23:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:19,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236810064] [2022-11-22 02:23:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:19,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:19,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236810064] [2022-11-22 02:23:19,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236810064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:19,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:19,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029658819] [2022-11-22 02:23:19,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:19,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:19,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:23:19,647 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-22 02:23:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:19,816 INFO L93 Difference]: Finished difference Result 260 states and 360 transitions. [2022-11-22 02:23:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-22 02:23:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:19,819 INFO L225 Difference]: With dead ends: 260 [2022-11-22 02:23:19,820 INFO L226 Difference]: Without dead ends: 260 [2022-11-22 02:23:19,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:23:19,821 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 149 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:19,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 186 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-22 02:23:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2022-11-22 02:23:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 159 states have (on average 1.628930817610063) internal successors, (259), 180 states have internal predecessors, (259), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-22 02:23:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 304 transitions. [2022-11-22 02:23:19,838 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 304 transitions. Word has length 8 [2022-11-22 02:23:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:19,838 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 304 transitions. [2022-11-22 02:23:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-22 02:23:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 304 transitions. [2022-11-22 02:23:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:23:19,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:19,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:23:19,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2011611306, now seen corresponding path program 1 times [2022-11-22 02:23:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:19,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613406769] [2022-11-22 02:23:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:19,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:20,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:20,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613406769] [2022-11-22 02:23:20,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613406769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:20,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:20,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:20,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527073678] [2022-11-22 02:23:20,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:20,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:20,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:23:20,028 INFO L87 Difference]: Start difference. First operand 199 states and 304 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 02:23:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:20,169 INFO L93 Difference]: Finished difference Result 247 states and 327 transitions. [2022-11-22 02:23:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:20,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-22 02:23:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:20,172 INFO L225 Difference]: With dead ends: 247 [2022-11-22 02:23:20,172 INFO L226 Difference]: Without dead ends: 247 [2022-11-22 02:23:20,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:23:20,174 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 180 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:20,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 205 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-22 02:23:20,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 213. [2022-11-22 02:23:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 172 states have (on average 1.627906976744186) internal successors, (280), 194 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-22 02:23:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 325 transitions. [2022-11-22 02:23:20,191 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 325 transitions. Word has length 9 [2022-11-22 02:23:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:20,191 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 325 transitions. [2022-11-22 02:23:20,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 02:23:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 325 transitions. [2022-11-22 02:23:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:23:20,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:20,193 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:23:20,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:20,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1340488016, now seen corresponding path program 1 times [2022-11-22 02:23:20,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143133907] [2022-11-22 02:23:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:20,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:20,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:20,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143133907] [2022-11-22 02:23:20,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143133907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813945227] [2022-11-22 02:23:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:20,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:20,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:20,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:20,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:23:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:23:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:20,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:20,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813945227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:20,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088448085] [2022-11-22 02:23:20,935 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:23:20,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:20,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:20,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:20,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:21,053 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-22 02:23:24,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:29,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2513#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 ~global~0.base) (<= |parse_input_~input#1.base| 3) (= |parse_input_#in~input#1.base| 3) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= ~global~0.base 0) (= |old(~global~0.base)| 0) (= |#NULL.offset| 0) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:23:29,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:29,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:29,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-22 02:23:29,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334954575] [2022-11-22 02:23:29,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:23:29,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:23:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:23:29,119 INFO L87 Difference]: Start difference. First operand 213 states and 325 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:29,560 INFO L93 Difference]: Finished difference Result 282 states and 389 transitions. [2022-11-22 02:23:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:23:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 02:23:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:29,564 INFO L225 Difference]: With dead ends: 282 [2022-11-22 02:23:29,564 INFO L226 Difference]: Without dead ends: 282 [2022-11-22 02:23:29,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:23:29,566 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 355 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:29,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 568 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:23:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-22 02:23:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2022-11-22 02:23:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 177 states have (on average 1.5593220338983051) internal successors, (276), 200 states have internal predecessors, (276), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-22 02:23:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 326 transitions. [2022-11-22 02:23:29,579 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 326 transitions. Word has length 13 [2022-11-22 02:23:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:29,580 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 326 transitions. [2022-11-22 02:23:29,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:23:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 326 transitions. [2022-11-22 02:23:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:23:29,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:29,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:29,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:29,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1394544414, now seen corresponding path program 1 times [2022-11-22 02:23:29,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:29,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192917887] [2022-11-22 02:23:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:30,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:30,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192917887] [2022-11-22 02:23:30,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192917887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841906089] [2022-11-22 02:23:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:30,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:30,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:30,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:23:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:30,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:23:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:30,445 INFO L350 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 7 [2022-11-22 02:23:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:30,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841906089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:30,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800141752] [2022-11-22 02:23:30,557 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:23:30,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:30,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:30,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:30,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:30,603 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-22 02:23:33,101 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:38,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [800141752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:38,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:38,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 18 [2022-11-22 02:23:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393506309] [2022-11-22 02:23:38,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:23:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:23:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:23:38,650 INFO L87 Difference]: Start difference. First operand 219 states and 326 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-22 02:23:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:40,190 INFO L93 Difference]: Finished difference Result 216 states and 306 transitions. [2022-11-22 02:23:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:23:40,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 14 [2022-11-22 02:23:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:40,196 INFO L225 Difference]: With dead ends: 216 [2022-11-22 02:23:40,197 INFO L226 Difference]: Without dead ends: 216 [2022-11-22 02:23:40,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:23:40,198 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:40,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 143 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:23:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-22 02:23:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2022-11-22 02:23:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 171 states have (on average 1.5029239766081872) internal successors, (257), 194 states have internal predecessors, (257), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-11-22 02:23:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 302 transitions. [2022-11-22 02:23:40,209 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 302 transitions. Word has length 14 [2022-11-22 02:23:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:40,210 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 302 transitions. [2022-11-22 02:23:40,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-22 02:23:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 302 transitions. [2022-11-22 02:23:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:23:40,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:40,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:40,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:40,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:40,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1630536874, now seen corresponding path program 1 times [2022-11-22 02:23:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374238102] [2022-11-22 02:23:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:40,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:40,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374238102] [2022-11-22 02:23:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374238102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:40,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:23:40,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:23:40,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398275234] [2022-11-22 02:23:40,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:23:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:23:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:23:40,467 INFO L87 Difference]: Start difference. First operand 212 states and 302 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:23:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:40,481 INFO L93 Difference]: Finished difference Result 218 states and 307 transitions. [2022-11-22 02:23:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:23:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-22 02:23:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:40,484 INFO L225 Difference]: With dead ends: 218 [2022-11-22 02:23:40,484 INFO L226 Difference]: Without dead ends: 218 [2022-11-22 02:23:40,484 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 [2022-11-22 02:23:40,485 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:40,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 120 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:23:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-22 02:23:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-11-22 02:23:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 174 states have (on average 1.4770114942528736) internal successors, (257), 200 states have internal predecessors, (257), 10 states have call successors, (10), 7 states have call predecessors, (10), 13 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-11-22 02:23:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 307 transitions. [2022-11-22 02:23:40,497 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 307 transitions. Word has length 23 [2022-11-22 02:23:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:40,498 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 307 transitions. [2022-11-22 02:23:40,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:23:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 307 transitions. [2022-11-22 02:23:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 02:23:40,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:40,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:23:40,500 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash -865792722, now seen corresponding path program 1 times [2022-11-22 02:23:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727426149] [2022-11-22 02:23:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:40,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727426149] [2022-11-22 02:23:40,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727426149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195706769] [2022-11-22 02:23:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:40,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:40,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:40,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:23:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:23:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:41,323 INFO L350 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 12 treesize of output 14 [2022-11-22 02:23:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:41,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:41,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195706769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174753535] [2022-11-22 02:23:41,605 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:23:41,605 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:41,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:41,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:41,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:41,746 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:23:41,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:23:41,776 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:23:41,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:23:42,316 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:23:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,570 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:23:42,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:23:42,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:42,609 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:23:42,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:23:42,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:23:48,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4098#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:23:48,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:23:48,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:23:48,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2022-11-22 02:23:48,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963598600] [2022-11-22 02:23:48,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:23:48,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:23:48,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1000, Unknown=2, NotChecked=0, Total=1190 [2022-11-22 02:23:48,946 INFO L87 Difference]: Start difference. First operand 218 states and 307 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:23:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:49,936 INFO L93 Difference]: Finished difference Result 327 states and 459 transitions. [2022-11-22 02:23:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:23:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-11-22 02:23:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:49,948 INFO L225 Difference]: With dead ends: 327 [2022-11-22 02:23:49,949 INFO L226 Difference]: Without dead ends: 327 [2022-11-22 02:23:49,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=343, Invalid=1725, Unknown=2, NotChecked=0, Total=2070 [2022-11-22 02:23:49,951 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 584 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 74 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:49,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 195 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 248 Invalid, 4 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:23:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-22 02:23:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 233. [2022-11-22 02:23:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 190 states have (on average 1.4789473684210526) internal successors, (281), 215 states have internal predecessors, (281), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2022-11-22 02:23:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 330 transitions. [2022-11-22 02:23:49,974 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 330 transitions. Word has length 25 [2022-11-22 02:23:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:49,976 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 330 transitions. [2022-11-22 02:23:49,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:23:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 330 transitions. [2022-11-22 02:23:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 02:23:49,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:49,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:49,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:50,189 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1126681315, now seen corresponding path program 1 times [2022-11-22 02:23:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275867073] [2022-11-22 02:23:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:50,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:50,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275867073] [2022-11-22 02:23:50,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275867073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:50,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430678317] [2022-11-22 02:23:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:50,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:50,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:23:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:23:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:50,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:50,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430678317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:50,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:50,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-22 02:23:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780535358] [2022-11-22 02:23:50,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:50,729 INFO L87 Difference]: Start difference. First operand 233 states and 330 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:23:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:50,833 INFO L93 Difference]: Finished difference Result 279 states and 389 transitions. [2022-11-22 02:23:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:50,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-22 02:23:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:50,835 INFO L225 Difference]: With dead ends: 279 [2022-11-22 02:23:50,836 INFO L226 Difference]: Without dead ends: 279 [2022-11-22 02:23:50,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:23:50,837 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 111 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:50,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 159 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-22 02:23:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 237. [2022-11-22 02:23:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 194 states have (on average 1.4690721649484537) internal successors, (285), 219 states have internal predecessors, (285), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2022-11-22 02:23:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 334 transitions. [2022-11-22 02:23:50,850 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 334 transitions. Word has length 26 [2022-11-22 02:23:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:50,851 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 334 transitions. [2022-11-22 02:23:50,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:23:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 334 transitions. [2022-11-22 02:23:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:23:50,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:50,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:50,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:23:51,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:23:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1196848077, now seen corresponding path program 1 times [2022-11-22 02:23:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:51,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062872416] [2022-11-22 02:23:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:51,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:51,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:51,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062872416] [2022-11-22 02:23:51,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062872416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:51,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160853367] [2022-11-22 02:23:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:51,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:51,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:51,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:23:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:23:51,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:52,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:23:52,344 INFO L350 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 12 treesize of output 14 [2022-11-22 02:23:52,485 INFO L350 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 7 [2022-11-22 02:23:52,489 INFO L350 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 7 [2022-11-22 02:23:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:52,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:52,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160853367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614119316] [2022-11-22 02:23:52,773 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:23:52,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:52,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:52,774 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:52,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:52,966 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:23:52,966 INFO L350 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-22 02:23:53,314 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:23:53,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:23:53,798 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:23:55,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:24:12,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5420#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-22 02:24:12,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:24:12,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:24:12,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-22 02:24:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640391257] [2022-11-22 02:24:12,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:24:12,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:24:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:24:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1167, Unknown=2, NotChecked=0, Total=1482 [2022-11-22 02:24:12,197 INFO L87 Difference]: Start difference. First operand 237 states and 334 transitions. Second operand has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:24:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:13,340 INFO L93 Difference]: Finished difference Result 279 states and 387 transitions. [2022-11-22 02:24:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:24:13,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-22 02:24:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:13,344 INFO L225 Difference]: With dead ends: 279 [2022-11-22 02:24:13,344 INFO L226 Difference]: Without dead ends: 279 [2022-11-22 02:24:13,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=474, Invalid=1971, Unknown=5, NotChecked=0, Total=2450 [2022-11-22 02:24:13,346 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 367 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 72 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:13,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 298 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 368 Invalid, 12 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:24:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-22 02:24:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 239. [2022-11-22 02:24:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 196 states have (on average 1.4540816326530612) internal successors, (285), 221 states have internal predecessors, (285), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2022-11-22 02:24:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 334 transitions. [2022-11-22 02:24:13,358 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 334 transitions. Word has length 27 [2022-11-22 02:24:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:13,359 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 334 transitions. [2022-11-22 02:24:13,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:24:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 334 transitions. [2022-11-22 02:24:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:24:13,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:13,360 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] [2022-11-22 02:24:13,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:13,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:24:13,568 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:24:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1552415230, now seen corresponding path program 1 times [2022-11-22 02:24:13,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140030619] [2022-11-22 02:24:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:13,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140030619] [2022-11-22 02:24:13,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140030619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79196670] [2022-11-22 02:24:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:13,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:13,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:13,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:13,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:24:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:24:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:14,061 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:24:14,062 INFO L350 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 [2022-11-22 02:24:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:14,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79196670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034371137] [2022-11-22 02:24:14,206 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:24:14,206 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:24:14,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:24:14,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:24:14,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:24:14,359 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:24:14,359 INFO L350 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-22 02:24:14,705 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:24:14,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:24:15,046 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:24:16,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:24:32,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6097#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-11-22 02:24:32,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:24:32,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:24:32,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-22 02:24:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248038635] [2022-11-22 02:24:32,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:24:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:24:32,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:24:32,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:24:32,137 INFO L87 Difference]: Start difference. First operand 239 states and 334 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:24:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:32,841 INFO L93 Difference]: Finished difference Result 367 states and 480 transitions. [2022-11-22 02:24:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:24:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-22 02:24:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:32,845 INFO L225 Difference]: With dead ends: 367 [2022-11-22 02:24:32,845 INFO L226 Difference]: Without dead ends: 367 [2022-11-22 02:24:32,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:24:32,847 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 462 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:32,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 358 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:24:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-22 02:24:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 298. [2022-11-22 02:24:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 252 states have (on average 1.4325396825396826) internal successors, (361), 278 states have internal predecessors, (361), 10 states have call successors, (10), 9 states have call predecessors, (10), 15 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2022-11-22 02:24:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 410 transitions. [2022-11-22 02:24:32,859 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 410 transitions. Word has length 28 [2022-11-22 02:24:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:32,859 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 410 transitions. [2022-11-22 02:24:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:24:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 410 transitions. [2022-11-22 02:24:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:24:32,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:32,861 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] [2022-11-22 02:24:32,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:33,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:24:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash -880231825, now seen corresponding path program 1 times [2022-11-22 02:24:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:33,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065063339] [2022-11-22 02:24:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:33,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:33,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065063339] [2022-11-22 02:24:33,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065063339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:33,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967434456] [2022-11-22 02:24:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:33,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:33,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:33,360 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:33,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:24:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:33,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:24:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:33,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:33,632 INFO L350 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 12 treesize of output 14 [2022-11-22 02:24:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:33,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967434456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:33,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504629522] [2022-11-22 02:24:33,903 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:24:33,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:24:33,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:24:33,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:24:33,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:24:34,045 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:24:34,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:24:34,078 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:24:34,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:24:34,516 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:24:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:34,770 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:24:34,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-22 02:24:34,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:34,978 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:24:34,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:24:35,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:24:42,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6926#(and (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:24:42,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:24:42,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:24:42,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-22 02:24:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573756918] [2022-11-22 02:24:42,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:24:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:24:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:24:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:24:42,068 INFO L87 Difference]: Start difference. First operand 298 states and 410 transitions. Second operand has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:24:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:43,629 INFO L93 Difference]: Finished difference Result 484 states and 623 transitions. [2022-11-22 02:24:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:24:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-22 02:24:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:43,634 INFO L225 Difference]: With dead ends: 484 [2022-11-22 02:24:43,635 INFO L226 Difference]: Without dead ends: 484 [2022-11-22 02:24:43,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=365, Invalid=2085, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:24:43,636 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 722 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:43,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 355 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 381 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:24:43,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-22 02:24:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 357. [2022-11-22 02:24:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.4627831715210355) internal successors, (452), 340 states have internal predecessors, (452), 8 states have call successors, (8), 8 states have call predecessors, (8), 19 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-22 02:24:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 487 transitions. [2022-11-22 02:24:43,651 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 487 transitions. Word has length 29 [2022-11-22 02:24:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:43,651 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 487 transitions. [2022-11-22 02:24:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:24:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 487 transitions. [2022-11-22 02:24:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 02:24:43,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:43,653 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, 1] [2022-11-22 02:24:43,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:43,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:24:43,856 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:24:43,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash 183457269, now seen corresponding path program 1 times [2022-11-22 02:24:43,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:43,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048689030] [2022-11-22 02:24:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:44,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048689030] [2022-11-22 02:24:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048689030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950820946] [2022-11-22 02:24:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:44,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:44,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:44,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:24:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:44,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:24:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:44,595 INFO L350 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 12 treesize of output 14 [2022-11-22 02:24:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:44,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:49,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950820946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96416394] [2022-11-22 02:24:49,042 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:24:49,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:24:49,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:24:49,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:24:49,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:24:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:49,286 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:24:49,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-22 02:24:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:49,377 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:24:49,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-22 02:24:49,950 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:24:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:50,201 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:24:50,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-22 02:24:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:50,272 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:24:50,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-22 02:24:50,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:24:54,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7967#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:24:54,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:24:54,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:24:54,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-22 02:24:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192611705] [2022-11-22 02:24:54,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:24:54,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:24:54,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:24:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:24:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1312, Unknown=5, NotChecked=0, Total=1482 [2022-11-22 02:24:54,710 INFO L87 Difference]: Start difference. First operand 357 states and 487 transitions. Second operand has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:24:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:55,714 INFO L93 Difference]: Finished difference Result 437 states and 577 transitions. [2022-11-22 02:24:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:24:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-22 02:24:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:55,717 INFO L225 Difference]: With dead ends: 437 [2022-11-22 02:24:55,717 INFO L226 Difference]: Without dead ends: 437 [2022-11-22 02:24:55,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=348, Invalid=2197, Unknown=5, NotChecked=0, Total=2550 [2022-11-22 02:24:55,718 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 595 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 78 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:55,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 276 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 443 Invalid, 6 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:24:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-22 02:24:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 286. [2022-11-22 02:24:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 249 states have (on average 1.4016064257028114) internal successors, (349), 273 states have internal predecessors, (349), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-22 02:24:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 373 transitions. [2022-11-22 02:24:55,729 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 373 transitions. Word has length 33 [2022-11-22 02:24:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:55,729 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 373 transitions. [2022-11-22 02:24:55,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:24:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 373 transitions. [2022-11-22 02:24:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:24:55,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:55,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:24:55,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:24:55,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:24:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1392207993, now seen corresponding path program 1 times [2022-11-22 02:24:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:24:55,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413488444] [2022-11-22 02:24:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:24:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:56,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:24:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413488444] [2022-11-22 02:24:56,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413488444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980286094] [2022-11-22 02:24:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:56,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:56,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:56,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:56,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:24:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:56,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:24:56,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:56,618 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:24:56,618 INFO L350 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 [2022-11-22 02:24:56,790 INFO L350 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 7 [2022-11-22 02:24:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:56,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:56,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980286094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61698505] [2022-11-22 02:24:56,947 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:24:56,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:24:56,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:24:56,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:24:56,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:24:57,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:57,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:57,151 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:24:57,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-22 02:24:57,262 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-22 02:24:57,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-11-22 02:24:57,814 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:24:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:58,225 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:24:58,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-22 02:24:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:58,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:24:58,272 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 02:24:58,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-22 02:24:58,453 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:01,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8893#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:25:01,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:25:01,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:25:01,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-22 02:25:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9373802] [2022-11-22 02:25:01,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:25:01,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:25:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:25:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1233, Unknown=1, NotChecked=0, Total=1406 [2022-11-22 02:25:01,972 INFO L87 Difference]: Start difference. First operand 286 states and 373 transitions. Second operand has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:25:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:02,729 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-11-22 02:25:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:25:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-22 02:25:02,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:02,733 INFO L225 Difference]: With dead ends: 404 [2022-11-22 02:25:02,733 INFO L226 Difference]: Without dead ends: 404 [2022-11-22 02:25:02,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=302, Invalid=1953, Unknown=1, NotChecked=0, Total=2256 [2022-11-22 02:25:02,734 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 504 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:02,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 410 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 386 Invalid, 2 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:25:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-22 02:25:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2022-11-22 02:25:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 285 states have (on average 1.3824561403508773) internal successors, (394), 310 states have internal predecessors, (394), 7 states have call successors, (7), 7 states have call predecessors, (7), 15 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-22 02:25:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2022-11-22 02:25:02,746 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 34 [2022-11-22 02:25:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:02,747 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2022-11-22 02:25:02,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:25:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2022-11-22 02:25:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:25:02,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:02,748 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, 1, 1] [2022-11-22 02:25:02,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:02,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:25:02,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:25:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash -680812676, now seen corresponding path program 1 times [2022-11-22 02:25:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056578644] [2022-11-22 02:25:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:02,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:25:03,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056578644] [2022-11-22 02:25:03,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056578644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425065719] [2022-11-22 02:25:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:03,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:03,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:03,131 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:03,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:25:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:25:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:03,410 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:25:03,411 INFO L350 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 12 treesize of output 18 [2022-11-22 02:25:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:25:03,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:03,520 INFO L350 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 24 treesize of output 20 [2022-11-22 02:25:03,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-22 02:25:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:25:03,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425065719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:25:03,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819037693] [2022-11-22 02:25:03,728 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:25:03,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:03,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:03,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:03,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:04,027 INFO L321 Elim1Store]: treesize reduction 148, result has 41.5 percent of original size [2022-11-22 02:25:04,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 187 treesize of output 258 [2022-11-22 02:25:06,640 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:25:07,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:07,150 INFO L321 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2022-11-22 02:25:07,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 57 [2022-11-22 02:25:07,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:10,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9873#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (not (= (select |#valid| |~#commands~0.base|) 1)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 02:25:10,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:25:10,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:25:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2022-11-22 02:25:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56710960] [2022-11-22 02:25:10,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:25:10,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:25:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:25:10,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:25:10,642 INFO L87 Difference]: Start difference. First operand 325 states and 423 transitions. Second operand has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:25:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:11,385 INFO L93 Difference]: Finished difference Result 588 states and 742 transitions. [2022-11-22 02:25:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:25:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-11-22 02:25:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:11,389 INFO L225 Difference]: With dead ends: 588 [2022-11-22 02:25:11,389 INFO L226 Difference]: Without dead ends: 588 [2022-11-22 02:25:11,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:25:11,390 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 410 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:11,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 359 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:25:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-11-22 02:25:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 518. [2022-11-22 02:25:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 461 states have (on average 1.3926247288503253) internal successors, (642), 493 states have internal predecessors, (642), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) [2022-11-22 02:25:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 698 transitions. [2022-11-22 02:25:11,407 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 698 transitions. Word has length 34 [2022-11-22 02:25:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:11,408 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 698 transitions. [2022-11-22 02:25:11,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:25:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 698 transitions. [2022-11-22 02:25:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:25:11,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:11,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:25:11,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:11,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:25:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash 208774868, now seen corresponding path program 1 times [2022-11-22 02:25:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:11,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133345653] [2022-11-22 02:25:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:12,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:12,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133345653] [2022-11-22 02:25:12,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133345653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:12,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146703578] [2022-11-22 02:25:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:12,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:12,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:12,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:12,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:25:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:25:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:12,450 INFO L350 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 12 treesize of output 14 [2022-11-22 02:25:12,656 INFO L350 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 7 [2022-11-22 02:25:12,659 INFO L350 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 7 [2022-11-22 02:25:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:12,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:12,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146703578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:12,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199116591] [2022-11-22 02:25:12,956 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:25:12,956 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:12,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:12,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:12,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,160 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:25:13,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-22 02:25:13,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,237 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:25:13,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-22 02:25:13,648 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:25:13,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,840 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:25:13,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-22 02:25:13,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:13,891 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 02:25:13,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-22 02:25:14,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:18,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11191#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:25:18,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:25:18,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:25:18,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2022-11-22 02:25:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271967496] [2022-11-22 02:25:18,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:25:18,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:25:18,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:25:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 02:25:18,013 INFO L87 Difference]: Start difference. First operand 518 states and 698 transitions. Second operand has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:25:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:19,670 INFO L93 Difference]: Finished difference Result 780 states and 999 transitions. [2022-11-22 02:25:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:25:19,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-22 02:25:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:19,674 INFO L225 Difference]: With dead ends: 780 [2022-11-22 02:25:19,674 INFO L226 Difference]: Without dead ends: 780 [2022-11-22 02:25:19,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=429, Invalid=2993, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 02:25:19,676 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 665 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 80 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:19,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 525 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 672 Invalid, 4 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:25:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-11-22 02:25:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 576. [2022-11-22 02:25:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 518 states have (on average 1.3841698841698842) internal successors, (717), 551 states have internal predecessors, (717), 12 states have call successors, (12), 12 states have call predecessors, (12), 28 states have return successors, (41), 12 states have call predecessors, (41), 12 states have call successors, (41) [2022-11-22 02:25:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 770 transitions. [2022-11-22 02:25:19,697 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 770 transitions. Word has length 35 [2022-11-22 02:25:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:19,698 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 770 transitions. [2022-11-22 02:25:19,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:25:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 770 transitions. [2022-11-22 02:25:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:25:19,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:19,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:25:19,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:19,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:25:19,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:25:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 369643505, now seen corresponding path program 1 times [2022-11-22 02:25:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:19,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715417737] [2022-11-22 02:25:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:20,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715417737] [2022-11-22 02:25:20,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715417737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:20,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166339058] [2022-11-22 02:25:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:20,602 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:20,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:25:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:25:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:21,055 INFO L350 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 12 treesize of output 14 [2022-11-22 02:25:21,135 INFO L350 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 7 [2022-11-22 02:25:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:25:21,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:21,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166339058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101883028] [2022-11-22 02:25:21,304 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:25:21,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:21,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:21,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:21,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:21,648 INFO L321 Elim1Store]: treesize reduction 148, result has 41.5 percent of original size [2022-11-22 02:25:21,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 187 treesize of output 258 [2022-11-22 02:25:22,477 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:25:22,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:23,006 INFO L321 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2022-11-22 02:25:23,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 57 [2022-11-22 02:25:23,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:27,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12741#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 02:25:27,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:25:27,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:25:27,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-22 02:25:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493612812] [2022-11-22 02:25:27,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:25:27,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:25:27,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:25:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:25:27,056 INFO L87 Difference]: Start difference. First operand 576 states and 770 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:25:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:28,793 INFO L93 Difference]: Finished difference Result 424 states and 504 transitions. [2022-11-22 02:25:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 02:25:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-22 02:25:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:28,795 INFO L225 Difference]: With dead ends: 424 [2022-11-22 02:25:28,795 INFO L226 Difference]: Without dead ends: 424 [2022-11-22 02:25:28,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=446, Invalid=3214, Unknown=0, NotChecked=0, Total=3660 [2022-11-22 02:25:28,804 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 720 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:28,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 507 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:25:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-22 02:25:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 335. [2022-11-22 02:25:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 297 states have (on average 1.3468013468013469) internal successors, (400), 320 states have internal predecessors, (400), 7 states have call successors, (7), 7 states have call predecessors, (7), 14 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-22 02:25:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2022-11-22 02:25:28,818 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 35 [2022-11-22 02:25:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:28,818 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2022-11-22 02:25:28,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:25:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2022-11-22 02:25:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:25:28,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:28,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:25:28,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:29,032 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:25:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1043834251, now seen corresponding path program 1 times [2022-11-22 02:25:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:29,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221700694] [2022-11-22 02:25:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:29,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:29,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221700694] [2022-11-22 02:25:29,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221700694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:29,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667108290] [2022-11-22 02:25:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:29,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:29,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:29,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:25:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:29,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:25:29,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:29,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667108290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:25:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407486459] [2022-11-22 02:25:29,307 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:25:29,308 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:29,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:29,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:29,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:29,465 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:25:29,466 INFO L350 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-22 02:25:29,761 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:25:29,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:25:30,184 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:25:31,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:45,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1407486459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:25:45,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:25:45,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-22 02:25:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131542715] [2022-11-22 02:25:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:25:45,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:25:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:25:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:25:45,853 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:25:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:48,518 INFO L93 Difference]: Finished difference Result 470 states and 584 transitions. [2022-11-22 02:25:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:25:48,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-22 02:25:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:48,523 INFO L225 Difference]: With dead ends: 470 [2022-11-22 02:25:48,523 INFO L226 Difference]: Without dead ends: 470 [2022-11-22 02:25:48,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:25:48,524 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 158 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:48,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 163 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 02:25:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-22 02:25:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 432. [2022-11-22 02:25:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 388 states have (on average 1.3556701030927836) internal successors, (526), 413 states have internal predecessors, (526), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-22 02:25:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 561 transitions. [2022-11-22 02:25:48,539 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 561 transitions. Word has length 37 [2022-11-22 02:25:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:48,540 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 561 transitions. [2022-11-22 02:25:48,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:25:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 561 transitions. [2022-11-22 02:25:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:25:48,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:48,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:25:48,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:48,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:48,749 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:25:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2000876483, now seen corresponding path program 1 times [2022-11-22 02:25:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:48,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163374799] [2022-11-22 02:25:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:48,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163374799] [2022-11-22 02:25:48,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163374799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912943900] [2022-11-22 02:25:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:48,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:48,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:48,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:48,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:25:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:25:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:49,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:49,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912943900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:25:49,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873342285] [2022-11-22 02:25:49,074 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:25:49,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:49,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:49,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:49,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:49,189 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:25:49,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:25:49,210 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:25:49,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:25:49,525 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:25:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:49,721 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:25:49,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-22 02:25:49,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:49,890 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:25:49,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:25:50,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:55,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14930#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (not (< ~global~0.base |#StackHeapBarrier|)) (<= 6 |~#commands~0.base|) (<= 0 |parse_input_c1_~x~0#1.offset|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= ~global~0.offset 0) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_#in~input#1.base| 4) (<= |parse_input_c1_~x~0#1.offset| 0) (<= |parse_input_~input#1.base| 4) (<= |parse_input_~i~0#1| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-22 02:25:55,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:25:55,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:25:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-22 02:25:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940058481] [2022-11-22 02:25:55,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:25:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:25:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:25:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:25:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:25:55,232 INFO L87 Difference]: Start difference. First operand 432 states and 561 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:25:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:25:55,308 INFO L93 Difference]: Finished difference Result 438 states and 555 transitions. [2022-11-22 02:25:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:25:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-11-22 02:25:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:25:55,312 INFO L225 Difference]: With dead ends: 438 [2022-11-22 02:25:55,312 INFO L226 Difference]: Without dead ends: 438 [2022-11-22 02:25:55,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:25:55,314 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:25:55,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 71 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:25:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-22 02:25:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 434. [2022-11-22 02:25:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 391 states have (on average 1.3145780051150895) internal successors, (514), 415 states have internal predecessors, (514), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-22 02:25:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 551 transitions. [2022-11-22 02:25:55,328 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 551 transitions. Word has length 38 [2022-11-22 02:25:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:25:55,329 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 551 transitions. [2022-11-22 02:25:55,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:25:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 551 transitions. [2022-11-22 02:25:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 02:25:55,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:25:55,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:25:55,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:25:55,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 02:25:55,537 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:25:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:25:55,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1897628723, now seen corresponding path program 1 times [2022-11-22 02:25:55,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:25:55,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676093479] [2022-11-22 02:25:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:55,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:25:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:55,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:25:55,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676093479] [2022-11-22 02:25:55,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676093479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:25:55,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315832351] [2022-11-22 02:25:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:25:55,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:25:55,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:25:55,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:25:55,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:25:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:25:55,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:25:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:25:55,797 INFO L350 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 [2022-11-22 02:25:55,849 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:25:55,849 INFO L350 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 [2022-11-22 02:25:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:55,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:25:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:25:56,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315832351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:25:56,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631267516] [2022-11-22 02:25:56,039 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:25:56,039 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:25:56,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:25:56,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:25:56,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:25:56,136 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:25:56,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:25:56,158 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:25:56,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:25:56,439 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:25:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:56,584 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:25:56,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:25:56,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:25:56,616 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:25:56,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:25:56,735 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:02,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16057#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:02,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:02,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:02,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-22 02:26:02,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291156931] [2022-11-22 02:26:02,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:26:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:26:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:26:02,032 INFO L87 Difference]: Start difference. First operand 434 states and 551 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:26:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:02,192 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2022-11-22 02:26:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:26:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-22 02:26:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:02,197 INFO L225 Difference]: With dead ends: 462 [2022-11-22 02:26:02,197 INFO L226 Difference]: Without dead ends: 462 [2022-11-22 02:26:02,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:26:02,198 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 40 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:02,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 202 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-22 02:26:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 438. [2022-11-22 02:26:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 419 states have internal predecessors, (516), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-22 02:26:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 553 transitions. [2022-11-22 02:26:02,211 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 553 transitions. Word has length 39 [2022-11-22 02:26:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:02,211 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 553 transitions. [2022-11-22 02:26:02,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:26:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 553 transitions. [2022-11-22 02:26:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:26:02,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:02,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:02,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:02,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 02:26:02,424 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:02,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2043904232, now seen corresponding path program 1 times [2022-11-22 02:26:02,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:02,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76812857] [2022-11-22 02:26:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:26:02,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76812857] [2022-11-22 02:26:02,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76812857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:26:02,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:26:02,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:26:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442356404] [2022-11-22 02:26:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:26:02,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:26:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:26:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:26:02,479 INFO L87 Difference]: Start difference. First operand 438 states and 553 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:26:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:02,493 INFO L93 Difference]: Finished difference Result 409 states and 501 transitions. [2022-11-22 02:26:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:26:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-22 02:26:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:02,495 INFO L225 Difference]: With dead ends: 409 [2022-11-22 02:26:02,495 INFO L226 Difference]: Without dead ends: 409 [2022-11-22 02:26:02,496 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 [2022-11-22 02:26:02,496 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:02,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 89 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:26:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-22 02:26:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 403. [2022-11-22 02:26:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 365 states have (on average 1.2547945205479452) internal successors, (458), 384 states have internal predecessors, (458), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-22 02:26:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 495 transitions. [2022-11-22 02:26:02,510 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 495 transitions. Word has length 44 [2022-11-22 02:26:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:02,510 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 495 transitions. [2022-11-22 02:26:02,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:26:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 495 transitions. [2022-11-22 02:26:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:26:02,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:02,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:02,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 02:26:02,512 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1600309656, now seen corresponding path program 1 times [2022-11-22 02:26:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:02,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422573862] [2022-11-22 02:26:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:02,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422573862] [2022-11-22 02:26:02,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422573862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075972930] [2022-11-22 02:26:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:02,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:02,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:02,793 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:02,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:26:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:26:02,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:03,018 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:26:03,018 INFO L350 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 [2022-11-22 02:26:03,155 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:26:03,155 INFO L350 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 [2022-11-22 02:26:03,194 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:26:03,194 INFO L350 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 12 treesize of output 18 [2022-11-22 02:26:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:03,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:03,313 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:26:03,314 INFO L350 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 110 treesize of output 105 [2022-11-22 02:26:03,550 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:26:03,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-11-22 02:26:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:03,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075972930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254493336] [2022-11-22 02:26:03,773 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:26:03,773 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:03,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:03,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:03,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:03,891 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:26:03,892 INFO L350 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-22 02:26:04,132 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:26:04,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:04,179 INFO L350 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 02:26:04,472 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 26 for LOIs [2022-11-22 02:26:04,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:04,574 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:26:04,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:04,597 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:26:04,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:26:04,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:04,729 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:26:04,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:26:04,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:08,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18102#(and (<= 0 |old(~global~0.offset)|) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (not (= (select |#valid| |~#commands~0.base|) 1)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:08,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:08,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:08,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-11-22 02:26:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488905341] [2022-11-22 02:26:08,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:08,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:26:08,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:26:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:26:08,180 INFO L87 Difference]: Start difference. First operand 403 states and 495 transitions. Second operand has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:26:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:08,489 INFO L93 Difference]: Finished difference Result 412 states and 503 transitions. [2022-11-22 02:26:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:26:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-22 02:26:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:08,491 INFO L225 Difference]: With dead ends: 412 [2022-11-22 02:26:08,491 INFO L226 Difference]: Without dead ends: 412 [2022-11-22 02:26:08,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=414, Invalid=2036, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:26:08,493 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 370 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:08,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 125 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:26:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-22 02:26:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 402. [2022-11-22 02:26:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 365 states have (on average 1.2493150684931507) internal successors, (456), 383 states have internal predecessors, (456), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-22 02:26:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 493 transitions. [2022-11-22 02:26:08,504 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 493 transitions. Word has length 48 [2022-11-22 02:26:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:08,504 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 493 transitions. [2022-11-22 02:26:08,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:26:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 493 transitions. [2022-11-22 02:26:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:26:08,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:08,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:08,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:08,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 02:26:08,712 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash 617755741, now seen corresponding path program 1 times [2022-11-22 02:26:08,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924655902] [2022-11-22 02:26:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:08,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:08,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924655902] [2022-11-22 02:26:08,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924655902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:08,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104284083] [2022-11-22 02:26:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:08,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:08,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:08,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:08,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:26:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:26:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:08,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:09,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104284083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:09,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777691102] [2022-11-22 02:26:09,056 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:26:09,056 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:09,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:09,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:09,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:09,190 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:26:09,190 INFO L350 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-22 02:26:09,410 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:26:09,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:09,796 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:26:09,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:09,922 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:26:09,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:09,947 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:26:09,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:26:10,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:12,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19236#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:12,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:12,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:12,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-22 02:26:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498683480] [2022-11-22 02:26:12,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:26:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:26:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:26:12,625 INFO L87 Difference]: Start difference. First operand 402 states and 493 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:26:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:12,761 INFO L93 Difference]: Finished difference Result 358 states and 420 transitions. [2022-11-22 02:26:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:26:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-11-22 02:26:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:12,763 INFO L225 Difference]: With dead ends: 358 [2022-11-22 02:26:12,763 INFO L226 Difference]: Without dead ends: 358 [2022-11-22 02:26:12,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:26:12,764 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 93 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:12,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 185 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:26:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-22 02:26:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 333. [2022-11-22 02:26:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 303 states have (on average 1.2343234323432344) internal successors, (374), 316 states have internal predecessors, (374), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-22 02:26:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 398 transitions. [2022-11-22 02:26:12,773 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 398 transitions. Word has length 48 [2022-11-22 02:26:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:12,774 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 398 transitions. [2022-11-22 02:26:12,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:26:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 398 transitions. [2022-11-22 02:26:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:26:12,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:12,775 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:12,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:12,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:12,981 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1930008197, now seen corresponding path program 1 times [2022-11-22 02:26:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:12,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818832521] [2022-11-22 02:26:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:12,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:13,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818832521] [2022-11-22 02:26:13,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818832521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031216971] [2022-11-22 02:26:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:13,852 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:13,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:26:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 02:26:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:14,257 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:26:14,257 INFO L350 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 [2022-11-22 02:26:14,529 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-22 02:26:14,530 INFO L350 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 29 [2022-11-22 02:26:14,593 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 02:26:14,593 INFO L350 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 16 treesize of output 26 [2022-11-22 02:26:14,761 INFO L350 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 7 [2022-11-22 02:26:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:14,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:14,892 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-22 02:26:14,893 INFO L350 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 178 treesize of output 165 [2022-11-22 02:26:15,209 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-22 02:26:15,210 INFO L350 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 3 case distinctions, treesize of input 174 treesize of output 185 [2022-11-22 02:26:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:15,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031216971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:15,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657809114] [2022-11-22 02:26:15,607 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:26:15,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:15,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:15,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:15,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:15,712 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:26:15,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:15,733 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:26:15,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:26:15,842 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:26:15,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:26:16,155 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:26:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:16,271 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:26:16,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-22 02:26:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:16,408 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:26:16,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:16,600 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:26:16,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:26:16,625 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:26:16,683 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:26:16,722 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:26:16,787 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:21,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20289#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:21,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:21,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:26:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2022-11-22 02:26:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977646911] [2022-11-22 02:26:21,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 02:26:21,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 02:26:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 02:26:21,887 INFO L87 Difference]: Start difference. First operand 333 states and 398 transitions. Second operand has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:26:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:23,349 INFO L93 Difference]: Finished difference Result 387 states and 451 transitions. [2022-11-22 02:26:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:26:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-11-22 02:26:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:23,366 INFO L225 Difference]: With dead ends: 387 [2022-11-22 02:26:23,366 INFO L226 Difference]: Without dead ends: 387 [2022-11-22 02:26:23,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=843, Invalid=4707, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 02:26:23,369 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 578 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:23,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 338 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:26:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-22 02:26:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 298. [2022-11-22 02:26:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 270 states have (on average 1.211111111111111) internal successors, (327), 283 states have internal predecessors, (327), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-22 02:26:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 348 transitions. [2022-11-22 02:26:23,379 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 348 transitions. Word has length 49 [2022-11-22 02:26:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:23,379 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 348 transitions. [2022-11-22 02:26:23,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:26:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 348 transitions. [2022-11-22 02:26:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:26:23,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:23,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:23,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:23,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 02:26:23,587 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -764196878, now seen corresponding path program 1 times [2022-11-22 02:26:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409121854] [2022-11-22 02:26:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:26:23,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:23,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409121854] [2022-11-22 02:26:23,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409121854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094819451] [2022-11-22 02:26:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:23,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:23,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:23,808 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:23,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:26:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:26:23,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:23,993 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:26:23,993 INFO L350 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 [2022-11-22 02:26:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:26:24,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:24,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094819451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:24,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45629565] [2022-11-22 02:26:24,222 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:26:24,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:24,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:24,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:24,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:24,486 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:26:24,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-11-22 02:26:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:24,559 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:26:24,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-11-22 02:26:24,872 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-22 02:26:25,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:25,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:25,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:25,185 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:26:25,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-22 02:26:25,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:25,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:25,236 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 02:26:25,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-11-22 02:26:25,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:28,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21265#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-22 02:26:28,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:28,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:26:28,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-11-22 02:26:28,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854578593] [2022-11-22 02:26:28,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:28,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:26:28,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:26:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:26:28,623 INFO L87 Difference]: Start difference. First operand 298 states and 348 transitions. Second operand has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:26:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:29,017 INFO L93 Difference]: Finished difference Result 315 states and 361 transitions. [2022-11-22 02:26:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:26:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-22 02:26:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:29,019 INFO L225 Difference]: With dead ends: 315 [2022-11-22 02:26:29,019 INFO L226 Difference]: Without dead ends: 315 [2022-11-22 02:26:29,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:26:29,020 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 210 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:29,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 228 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:26:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-22 02:26:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 298. [2022-11-22 02:26:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 270 states have (on average 1.2037037037037037) internal successors, (325), 283 states have internal predecessors, (325), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-22 02:26:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 346 transitions. [2022-11-22 02:26:29,028 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 346 transitions. Word has length 49 [2022-11-22 02:26:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:29,029 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 346 transitions. [2022-11-22 02:26:29,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:26:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 346 transitions. [2022-11-22 02:26:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:26:29,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:29,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:29,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:29,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 02:26:29,237 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2079700607, now seen corresponding path program 1 times [2022-11-22 02:26:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:29,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404205800] [2022-11-22 02:26:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:26:29,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:29,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404205800] [2022-11-22 02:26:29,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404205800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:29,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220604234] [2022-11-22 02:26:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:29,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:29,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:29,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 02:26:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:26:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:29,795 INFO L350 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 12 treesize of output 14 [2022-11-22 02:26:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:26:29,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:30,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220604234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007219604] [2022-11-22 02:26:30,208 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:26:30,208 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:30,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:30,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:30,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:30,475 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:26:30,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-22 02:26:30,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:30,572 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-22 02:26:30,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-22 02:26:30,982 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-22 02:26:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:31,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:31,300 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:26:31,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-22 02:26:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:31,368 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:26:31,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-11-22 02:26:31,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:35,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22170#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-11-22 02:26:35,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:35,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:26:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-11-22 02:26:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400155630] [2022-11-22 02:26:35,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:26:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:26:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:26:35,238 INFO L87 Difference]: Start difference. First operand 298 states and 346 transitions. Second operand has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:26:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:35,948 INFO L93 Difference]: Finished difference Result 316 states and 356 transitions. [2022-11-22 02:26:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:26:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2022-11-22 02:26:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:35,950 INFO L225 Difference]: With dead ends: 316 [2022-11-22 02:26:35,950 INFO L226 Difference]: Without dead ends: 316 [2022-11-22 02:26:35,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=370, Invalid=2080, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:26:35,951 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 312 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:35,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 261 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:26:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-22 02:26:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 297. [2022-11-22 02:26:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 270 states have (on average 1.174074074074074) internal successors, (317), 282 states have internal predecessors, (317), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-22 02:26:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 338 transitions. [2022-11-22 02:26:35,962 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 338 transitions. Word has length 50 [2022-11-22 02:26:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:35,963 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 338 transitions. [2022-11-22 02:26:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:26:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 338 transitions. [2022-11-22 02:26:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:26:35,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:35,965 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:35,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:36,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 02:26:36,172 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -687993113, now seen corresponding path program 1 times [2022-11-22 02:26:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:36,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467839099] [2022-11-22 02:26:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:36,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467839099] [2022-11-22 02:26:36,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467839099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731848948] [2022-11-22 02:26:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:36,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:36,709 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:36,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:26:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:26:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:36,965 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:26:36,966 INFO L350 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 [2022-11-22 02:26:37,100 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| Int) (v_ArrVal_174 Int)) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| 1) |c_old(~global~0.base)| v_ArrVal_174))) is different from true [2022-11-22 02:26:37,136 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-22 02:26:37,136 INFO L350 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-22 02:26:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:26:37,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:37,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731848948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:37,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293974316] [2022-11-22 02:26:37,634 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:26:37,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:37,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:37,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:37,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:37,767 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:26:37,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:37,789 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:26:37,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:26:37,944 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:26:37,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:26:38,321 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:26:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:38,465 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:26:38,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-11-22 02:26:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:38,629 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:26:38,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:38,845 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:26:38,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:26:38,876 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:26:38,935 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:26:38,972 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:26:39,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:43,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23088#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:26:43,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:43,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:26:43,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-22 02:26:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643301794] [2022-11-22 02:26:43,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:26:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:26:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1428, Unknown=1, NotChecked=78, Total=1722 [2022-11-22 02:26:43,254 INFO L87 Difference]: Start difference. First operand 297 states and 338 transitions. Second operand has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:26:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:44,458 INFO L93 Difference]: Finished difference Result 312 states and 352 transitions. [2022-11-22 02:26:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:26:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-11-22 02:26:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:44,460 INFO L225 Difference]: With dead ends: 312 [2022-11-22 02:26:44,460 INFO L226 Difference]: Without dead ends: 312 [2022-11-22 02:26:44,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=462, Invalid=2511, Unknown=1, NotChecked=106, Total=3080 [2022-11-22 02:26:44,461 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 319 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:44,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 305 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 382 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-22 02:26:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-22 02:26:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 296. [2022-11-22 02:26:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 281 states have internal predecessors, (315), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-22 02:26:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 336 transitions. [2022-11-22 02:26:44,469 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 336 transitions. Word has length 51 [2022-11-22 02:26:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:44,469 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 336 transitions. [2022-11-22 02:26:44,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:26:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 336 transitions. [2022-11-22 02:26:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 02:26:44,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:44,471 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:44,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:44,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 02:26:44,678 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash -842108514, now seen corresponding path program 1 times [2022-11-22 02:26:44,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:44,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65444757] [2022-11-22 02:26:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:45,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:45,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65444757] [2022-11-22 02:26:45,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65444757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:45,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123561198] [2022-11-22 02:26:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:45,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:45,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:45,532 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:45,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 02:26:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 02:26:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:46,001 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:26:46,002 INFO L350 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 [2022-11-22 02:26:46,419 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-22 02:26:46,419 INFO L350 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-22 02:26:46,622 INFO L350 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 7 [2022-11-22 02:26:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:26:46,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:46,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123561198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:46,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735688972] [2022-11-22 02:26:46,831 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:26:46,831 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:46,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:46,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:46,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:47,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:47,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:47,046 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:26:47,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-11-22 02:26:47,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:47,125 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-22 02:26:47,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-11-22 02:26:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:47,371 INFO L321 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-11-22 02:26:47,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 457 treesize of output 461 [2022-11-22 02:26:47,968 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:26:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,434 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-22 02:26:48,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 219 treesize of output 218 [2022-11-22 02:26:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,525 INFO L321 Elim1Store]: treesize reduction 166, result has 23.9 percent of original size [2022-11-22 02:26:48,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 219 treesize of output 242 [2022-11-22 02:26:48,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:26:48,783 INFO L321 Elim1Store]: treesize reduction 199, result has 26.8 percent of original size [2022-11-22 02:26:48,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 224 treesize of output 261 [2022-11-22 02:26:48,849 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:26:48,911 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:26:48,954 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:26:49,022 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:26:56,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23983#(and (or (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|)) 1) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|)) (= |old(~global~0.offset)| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) |~#commands~0.offset|) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) |~#commands~0.offset|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0))' at error location [2022-11-22 02:26:56,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:26:56,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:26:56,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-11-22 02:26:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800865200] [2022-11-22 02:26:56,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:26:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:26:56,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:26:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:26:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2207, Unknown=6, NotChecked=0, Total=2450 [2022-11-22 02:26:56,876 INFO L87 Difference]: Start difference. First operand 296 states and 336 transitions. Second operand has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:26:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:26:58,958 INFO L93 Difference]: Finished difference Result 346 states and 386 transitions. [2022-11-22 02:26:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:26:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-22 02:26:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:26:58,960 INFO L225 Difference]: With dead ends: 346 [2022-11-22 02:26:58,960 INFO L226 Difference]: Without dead ends: 346 [2022-11-22 02:26:58,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=530, Invalid=3496, Unknown=6, NotChecked=0, Total=4032 [2022-11-22 02:26:58,961 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 564 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 111 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:26:58,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 246 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 487 Invalid, 15 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:26:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-22 02:26:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 291. [2022-11-22 02:26:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 266 states have (on average 1.1616541353383458) internal successors, (309), 276 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-22 02:26:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 330 transitions. [2022-11-22 02:26:58,971 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 330 transitions. Word has length 57 [2022-11-22 02:26:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:26:58,971 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 330 transitions. [2022-11-22 02:26:58,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:26:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 330 transitions. [2022-11-22 02:26:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:26:58,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:26:58,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:26:58,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:26:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:59,180 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:26:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:26:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1923927622, now seen corresponding path program 1 times [2022-11-22 02:26:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:26:59,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420025122] [2022-11-22 02:26:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:26:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:26:59,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:26:59,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420025122] [2022-11-22 02:26:59,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420025122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:26:59,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117607182] [2022-11-22 02:26:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:26:59,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:26:59,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:26:59,269 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:26:59,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 02:26:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:26:59,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:26:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:26:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:26:59,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:26:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:26:59,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117607182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:26:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475917973] [2022-11-22 02:26:59,523 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:26:59,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:26:59,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:26:59,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:26:59,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:26:59,627 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:26:59,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:26:59,655 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:26:59,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:26:59,789 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:26:59,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:27:00,198 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:27:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:00,333 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:27:00,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:27:00,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:00,361 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:27:00,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:27:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:00,525 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:27:00,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:27:00,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:03,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1475917973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:03,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:03,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-22 02:27:03,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425686703] [2022-11-22 02:27:03,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:03,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:27:03,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:27:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:27:03,218 INFO L87 Difference]: Start difference. First operand 291 states and 330 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:27:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:04,050 INFO L93 Difference]: Finished difference Result 358 states and 403 transitions. [2022-11-22 02:27:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:27:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-11-22 02:27:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:04,053 INFO L225 Difference]: With dead ends: 358 [2022-11-22 02:27:04,053 INFO L226 Difference]: Without dead ends: 358 [2022-11-22 02:27:04,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:27:04,054 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:04,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 155 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:27:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-22 02:27:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 343. [2022-11-22 02:27:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 315 states have (on average 1.161904761904762) internal successors, (366), 326 states have internal predecessors, (366), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-22 02:27:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 391 transitions. [2022-11-22 02:27:04,062 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 391 transitions. Word has length 60 [2022-11-22 02:27:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:04,062 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 391 transitions. [2022-11-22 02:27:04,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:27:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 391 transitions. [2022-11-22 02:27:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:27:04,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:04,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:04,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:04,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-22 02:27:04,270 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1014263473, now seen corresponding path program 1 times [2022-11-22 02:27:04,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:04,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408912509] [2022-11-22 02:27:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:04,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:27:04,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:04,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408912509] [2022-11-22 02:27:04,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408912509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:04,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284617970] [2022-11-22 02:27:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:04,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:04,380 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:04,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 02:27:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:27:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:27:04,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:27:04,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284617970] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:04,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:27:04,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-11-22 02:27:04,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210719457] [2022-11-22 02:27:04,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:04,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:27:04,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:27:04,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:27:04,758 INFO L87 Difference]: Start difference. First operand 343 states and 391 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:04,844 INFO L93 Difference]: Finished difference Result 359 states and 404 transitions. [2022-11-22 02:27:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:27:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-11-22 02:27:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:04,846 INFO L225 Difference]: With dead ends: 359 [2022-11-22 02:27:04,846 INFO L226 Difference]: Without dead ends: 343 [2022-11-22 02:27:04,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:27:04,847 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:04,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 133 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:27:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-22 02:27:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 332. [2022-11-22 02:27:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 305 states have (on average 1.160655737704918) internal successors, (354), 315 states have internal predecessors, (354), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-22 02:27:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 378 transitions. [2022-11-22 02:27:04,854 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 378 transitions. Word has length 61 [2022-11-22 02:27:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:04,855 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 378 transitions. [2022-11-22 02:27:04,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:27:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 378 transitions. [2022-11-22 02:27:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 02:27:04,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:04,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:04,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:05,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-22 02:27:05,063 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:05,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2058510792, now seen corresponding path program 1 times [2022-11-22 02:27:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:05,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19292084] [2022-11-22 02:27:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:05,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:27:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19292084] [2022-11-22 02:27:05,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19292084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047311799] [2022-11-22 02:27:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:05,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:05,371 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:05,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 02:27:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:27:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:05,492 INFO L350 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 [2022-11-22 02:27:05,660 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:27:05,660 INFO L350 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 3 case distinctions, treesize of input 20 treesize of output 21 [2022-11-22 02:27:05,691 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 02:27:05,691 INFO L350 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 12 treesize of output 14 [2022-11-22 02:27:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:05,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:05,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047311799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:05,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362340287] [2022-11-22 02:27:05,788 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:27:05,788 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:27:05,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:27:05,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:27:05,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:27:05,923 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:27:05,923 INFO L350 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 6 case distinctions, treesize of input 43 treesize of output 111 [2022-11-22 02:27:06,138 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:27:06,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:27:06,303 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:27:06,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:27:06,320 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:27:06,404 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:27:06,719 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:27:06,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:06,819 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:27:06,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-11-22 02:27:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:06,841 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:27:06,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-11-22 02:27:06,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:06,977 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:27:06,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-11-22 02:27:07,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:27:10,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27067#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:27:10,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:10,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:27:10,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-22 02:27:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512562378] [2022-11-22 02:27:10,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:10,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:27:10,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:27:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=784, Unknown=1, NotChecked=0, Total=930 [2022-11-22 02:27:10,247 INFO L87 Difference]: Start difference. First operand 332 states and 378 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:10,541 INFO L93 Difference]: Finished difference Result 356 states and 398 transitions. [2022-11-22 02:27:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:27:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-11-22 02:27:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:10,543 INFO L225 Difference]: With dead ends: 356 [2022-11-22 02:27:10,543 INFO L226 Difference]: Without dead ends: 356 [2022-11-22 02:27:10,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=184, Invalid=1075, Unknown=1, NotChecked=0, Total=1260 [2022-11-22 02:27:10,544 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 95 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:10,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 135 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-22 02:27:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 337. [2022-11-22 02:27:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 310 states have (on average 1.1483870967741936) internal successors, (356), 320 states have internal predecessors, (356), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-22 02:27:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 380 transitions. [2022-11-22 02:27:10,551 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 380 transitions. Word has length 62 [2022-11-22 02:27:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:10,551 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 380 transitions. [2022-11-22 02:27:10,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 02:27:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 380 transitions. [2022-11-22 02:27:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:27:10,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:10,557 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:10,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:10,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 02:27:10,758 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:10,758 INFO L85 PathProgramCache]: Analyzing trace with hash 976800701, now seen corresponding path program 1 times [2022-11-22 02:27:10,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:27:10,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136833480] [2022-11-22 02:27:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:10,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:27:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:27:10,794 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:27:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:27:10,845 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:27:10,845 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:27:10,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-22 02:27:10,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-22 02:27:10,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-22 02:27:10,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-22 02:27:10,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-22 02:27:10,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-22 02:27:10,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-22 02:27:10,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-22 02:27:10,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-22 02:27:10,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2022-11-22 02:27:10,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2022-11-22 02:27:10,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2022-11-22 02:27:10,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2022-11-22 02:27:10,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2022-11-22 02:27:10,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2022-11-22 02:27:10,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2022-11-22 02:27:10,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2022-11-22 02:27:10,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2022-11-22 02:27:10,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2022-11-22 02:27:10,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2022-11-22 02:27:10,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2022-11-22 02:27:10,853 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2022-11-22 02:27:10,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2022-11-22 02:27:10,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-22 02:27:10,858 INFO L444 BasicCegarLoop]: Path program 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:10,862 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:27:10,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:27:10 BoogieIcfgContainer [2022-11-22 02:27:10,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:27:10,927 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:27:10,927 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:27:10,927 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:27:10,928 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:23:16" (3/4) ... [2022-11-22 02:27:10,931 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-22 02:27:10,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:27:10,932 INFO L158 Benchmark]: Toolchain (without parser) took 236184.73ms. Allocated memory was 138.4MB in the beginning and 377.5MB in the end (delta: 239.1MB). Free memory was 73.9MB in the beginning and 150.0MB in the end (delta: -76.1MB). Peak memory consumption was 163.3MB. Max. memory is 16.1GB. [2022-11-22 02:27:10,932 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory was 111.7MB in the beginning and 111.6MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:27:10,932 INFO L158 Benchmark]: CACSL2BoogieTranslator took 683.53ms. Allocated memory was 138.4MB in the beginning and 180.4MB in the end (delta: 41.9MB). Free memory was 73.6MB in the beginning and 139.8MB in the end (delta: -66.2MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-11-22 02:27:10,933 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.95ms. Allocated memory is still 180.4MB. Free memory was 139.8MB in the beginning and 137.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:27:10,933 INFO L158 Benchmark]: Boogie Preprocessor took 85.54ms. Allocated memory is still 180.4MB. Free memory was 137.7MB in the beginning and 136.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:27:10,933 INFO L158 Benchmark]: RCFGBuilder took 734.79ms. Allocated memory is still 180.4MB. Free memory was 136.5MB in the beginning and 118.6MB in the end (delta: 18.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-22 02:27:10,933 INFO L158 Benchmark]: TraceAbstraction took 234571.62ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 117.7MB in the beginning and 150.0MB in the end (delta: -32.3MB). Peak memory consumption was 163.6MB. Max. memory is 16.1GB. [2022-11-22 02:27:10,933 INFO L158 Benchmark]: Witness Printer took 4.70ms. Allocated memory is still 377.5MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:27:10,935 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory was 111.7MB in the beginning and 111.6MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 683.53ms. Allocated memory was 138.4MB in the beginning and 180.4MB in the end (delta: 41.9MB). Free memory was 73.6MB in the beginning and 139.8MB in the end (delta: -66.2MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.95ms. Allocated memory is still 180.4MB. Free memory was 139.8MB in the beginning and 137.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 85.54ms. Allocated memory is still 180.4MB. Free memory was 137.7MB in the beginning and 136.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 734.79ms. Allocated memory is still 180.4MB. Free memory was 136.5MB in the beginning and 118.6MB in the end (delta: 18.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 234571.62ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 117.7MB in the beginning and 150.0MB in the end (delta: -32.3MB). Peak memory consumption was 163.6MB. Max. memory is 16.1GB. * Witness Printer took 4.70ms. Allocated memory is still 377.5MB. Free memory is still 150.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 722. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 64 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 234.4s, OverallIterations: 34, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 mSolverCounterUnknown, 9446 SdHoareTripleChecker+Valid, 12.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9445 mSDsluCounter, 7934 SdHoareTripleChecker+Invalid, 10.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 62 IncrementalHoareTripleChecker+Unchecked, 6260 mSDsCounter, 1106 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8724 IncrementalHoareTripleChecker+Invalid, 9939 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1106 mSolverCounterUnsat, 1674 mSDtfsCounter, 8724 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2936 GetRequests, 1877 SyntacticMatches, 73 SemanticMatches, 986 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14609 ImplicationChecksByTransitivity, 157.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=576occurred in iteration=18, InterpolantAutomatonStates: 378, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 33 MinimizatonAttempts, 1695 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 26.4s InterpolantComputationTime, 2136 NumberOfCodeBlocks, 2136 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 2443 ConstructedInterpolants, 174 QuantifiedInterpolants, 24397 SizeOfPredicates, 107 NumberOfNonLiveVariables, 6639 ConjunctsInSsa, 464 ConjunctsInUnsatCore, 69 InterpolantComputations, 10 PerfectInterpolantSequences, 706/1376 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 5.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 63, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 113, TOOLS_POST_TIME: 4.6s, TOOLS_POST_CALL_APPLICATIONS: 12, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 131, TOOLS_QUANTIFIERELIM_TIME: 5.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 203, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 16, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 63, DOMAIN_ISBOTTOM_TIME: 0.2s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.8s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.8s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 758, DAG_COMPRESSION_RETAINED_NODES: 167, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-22 02:27:10,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:27:13,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:27:13,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:27:13,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:27:13,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:27:13,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:27:13,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:27:13,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:27:13,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:27:13,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:27:13,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:27:13,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:27:13,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:27:13,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:27:13,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:27:13,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:27:13,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:27:13,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:27:13,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:27:13,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:27:13,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:27:13,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:27:13,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:27:13,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:27:13,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:27:13,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:27:13,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:27:13,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:27:13,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:27:13,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:27:13,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:27:13,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:27:13,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:27:13,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:27:13,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:27:13,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:27:13,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:27:13,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:27:13,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:27:13,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:27:13,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:27:13,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 02:27:13,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:27:13,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:27:13,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:27:13,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:27:13,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:27:13,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:27:13,633 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:27:13,633 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:27:13,633 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:27:13,634 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:27:13,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:27:13,635 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:27:13,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:27:13,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:27:13,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:27:13,637 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:27:13,637 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:27:13,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:27:13,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:27:13,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:27:13,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:27:13,638 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:27:13,638 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 02:27:13,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:27:13,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:27:13,639 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:27:13,640 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:27:13,640 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:27:13,640 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:27:13,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:27:13,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:27:13,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:27:13,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:27:13,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:27:13,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:27:13,642 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:27:13,642 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:13,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:27:13,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:27:13,643 INFO L138 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_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2022-11-22 02:27:14,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:27:14,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:27:14,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:27:14,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:27:14,067 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:27:14,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-22 02:27:17,302 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:27:17,698 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:27:17,702 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-22 02:27:17,727 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data/eff9a9ccc/b6f696a6f9594a6a8368b66f967be27e/FLAGe7c6936e5 [2022-11-22 02:27:17,744 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/data/eff9a9ccc/b6f696a6f9594a6a8368b66f967be27e [2022-11-22 02:27:17,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:27:17,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:27:17,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:27:17,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:27:17,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:27:17,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:27:17" (1/1) ... [2022-11-22 02:27:17,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff340f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:17, skipping insertion in model container [2022-11-22 02:27:17,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:27:17" (1/1) ... [2022-11-22 02:27:17,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:27:17,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:27:18,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:27:18,203 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:27:18,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:27:18,345 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:27:18,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18 WrapperNode [2022-11-22 02:27:18,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:27:18,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:27:18,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:27:18,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:27:18,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,402 INFO L138 Inliner]: procedures = 169, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-11-22 02:27:18,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:27:18,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:27:18,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:27:18,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:27:18,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,437 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:27:18,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:27:18,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:27:18,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:27:18,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (1/1) ... [2022-11-22 02:27:18,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:27:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:18,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:27:18,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:27:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-22 02:27:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-22 02:27:18,535 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-22 02:27:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:27:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:27:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:27:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:27:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:27:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:27:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:27:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:27:18,681 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:27:18,683 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:27:19,110 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:27:19,120 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:27:19,120 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:27:19,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:19 BoogieIcfgContainer [2022-11-22 02:27:19,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:27:19,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:27:19,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:27:19,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:27:19,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:27:17" (1/3) ... [2022-11-22 02:27:19,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af58be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:19, skipping insertion in model container [2022-11-22 02:27:19,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:18" (2/3) ... [2022-11-22 02:27:19,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af58be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:19, skipping insertion in model container [2022-11-22 02:27:19,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:19" (3/3) ... [2022-11-22 02:27:19,131 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2022-11-22 02:27:19,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:27:19,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-11-22 02:27:19,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:27:19,208 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;@6d8d8bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:27:19,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-22 02:27:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 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) [2022-11-22 02:27:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:27:19,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:19,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:27:19,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2022-11-22 02:27:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599270050] [2022-11-22 02:27:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:19,273 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 [2022-11-22 02:27:19,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:19,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:19,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:27:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:19,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:19,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:19,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599270050] [2022-11-22 02:27:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599270050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:19,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:19,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:27:19,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410037697] [2022-11-22 02:27:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:19,693 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-22 02:27:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:19,901 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2022-11-22 02:27:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2022-11-22 02:27:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:19,915 INFO L225 Difference]: With dead ends: 121 [2022-11-22 02:27:19,915 INFO L226 Difference]: Without dead ends: 117 [2022-11-22 02:27:19,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:19,920 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:19,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-22 02:27:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2022-11-22 02:27:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 80 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 02:27:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-11-22 02:27:19,997 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 6 [2022-11-22 02:27:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:19,998 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-11-22 02:27:19,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-22 02:27:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-11-22 02:27:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:27:20,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:20,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:27:20,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:20,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:20,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2022-11-22 02:27:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250551695] [2022-11-22 02:27:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:20,216 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 [2022-11-22 02:27:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:20,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:20,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:27:20,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:20,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:20,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250551695] [2022-11-22 02:27:20,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250551695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:20,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:20,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:27:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497919172] [2022-11-22 02:27:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:20,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:27:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:27:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:27:20,473 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-22 02:27:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:20,730 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2022-11-22 02:27:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:27:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-11-22 02:27:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:20,733 INFO L225 Difference]: With dead ends: 214 [2022-11-22 02:27:20,733 INFO L226 Difference]: Without dead ends: 214 [2022-11-22 02:27:20,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:27:20,735 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 144 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:20,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 158 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-22 02:27:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2022-11-22 02:27:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 142 states have internal predecessors, (212), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:27:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2022-11-22 02:27:20,756 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 6 [2022-11-22 02:27:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:20,757 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2022-11-22 02:27:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-22 02:27:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2022-11-22 02:27:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:27:20,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:20,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:20,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:20,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:20,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2022-11-22 02:27:20,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979112266] [2022-11-22 02:27:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:20,972 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 [2022-11-22 02:27:20,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:20,974 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:21,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:27:21,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:21,190 INFO L350 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 7 [2022-11-22 02:27:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:21,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:21,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:21,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979112266] [2022-11-22 02:27:21,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979112266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:21,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:21,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902378627] [2022-11-22 02:27:21,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:21,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:27:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:21,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:27:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:27:21,208 INFO L87 Difference]: Start difference. First operand 156 states and 243 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-22 02:27:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:21,572 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2022-11-22 02:27:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:27:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-22 02:27:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:21,575 INFO L225 Difference]: With dead ends: 247 [2022-11-22 02:27:21,575 INFO L226 Difference]: Without dead ends: 247 [2022-11-22 02:27:21,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:27:21,576 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 109 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:21,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 191 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:27:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-22 02:27:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2022-11-22 02:27:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 145 states have internal predecessors, (215), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:27:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2022-11-22 02:27:21,596 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 7 [2022-11-22 02:27:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:21,596 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2022-11-22 02:27:21,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-22 02:27:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2022-11-22 02:27:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:27:21,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:21,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:21,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:21,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2022-11-22 02:27:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:21,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900104158] [2022-11-22 02:27:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:21,811 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 [2022-11-22 02:27:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:21,812 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:21,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:27:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:22,053 INFO L350 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 7 [2022-11-22 02:27:22,060 INFO L350 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 7 [2022-11-22 02:27:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:22,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:22,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:22,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900104158] [2022-11-22 02:27:22,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900104158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:22,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:22,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:22,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399200523] [2022-11-22 02:27:22,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:27:22,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:27:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:27:22,095 INFO L87 Difference]: Start difference. First operand 159 states and 246 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 02:27:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:22,374 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2022-11-22 02:27:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:27:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-11-22 02:27:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:22,376 INFO L225 Difference]: With dead ends: 216 [2022-11-22 02:27:22,376 INFO L226 Difference]: Without dead ends: 216 [2022-11-22 02:27:22,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:27:22,377 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 147 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:22,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 210 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-22 02:27:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2022-11-22 02:27:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 145 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:27:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2022-11-22 02:27:22,409 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 8 [2022-11-22 02:27:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:22,410 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2022-11-22 02:27:22,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 02:27:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2022-11-22 02:27:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:27:22,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:22,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:22,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:22,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:22,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2022-11-22 02:27:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:22,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298160680] [2022-11-22 02:27:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:22,614 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 [2022-11-22 02:27:22,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:22,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:22,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:27:22,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:22,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:22,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298160680] [2022-11-22 02:27:22,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298160680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:22,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:22,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:22,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664212076] [2022-11-22 02:27:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:27:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:27:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:27:22,772 INFO L87 Difference]: Start difference. First operand 159 states and 244 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 02:27:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:22,959 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2022-11-22 02:27:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:27:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2022-11-22 02:27:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:22,961 INFO L225 Difference]: With dead ends: 253 [2022-11-22 02:27:22,961 INFO L226 Difference]: Without dead ends: 253 [2022-11-22 02:27:22,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:27:22,962 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:22,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-22 02:27:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2022-11-22 02:27:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 177 states have internal predecessors, (259), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:27:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2022-11-22 02:27:22,976 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2022-11-22 02:27:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:22,976 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2022-11-22 02:27:22,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 02:27:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2022-11-22 02:27:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:27:22,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:22,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:22,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:23,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:23,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2022-11-22 02:27:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:23,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703946122] [2022-11-22 02:27:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:23,190 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 [2022-11-22 02:27:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:23,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:27:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:23,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:23,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:23,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703946122] [2022-11-22 02:27:23,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703946122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:23,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:23,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:23,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452622967] [2022-11-22 02:27:23,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:23,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:27:23,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:23,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:27:23,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:27:23,371 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-22 02:27:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:23,583 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2022-11-22 02:27:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:27:23,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-11-22 02:27:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:23,585 INFO L225 Difference]: With dead ends: 242 [2022-11-22 02:27:23,585 INFO L226 Difference]: Without dead ends: 242 [2022-11-22 02:27:23,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:27:23,586 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:23,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:27:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-22 02:27:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2022-11-22 02:27:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 167 states have (on average 1.6766467065868262) internal successors, (280), 191 states have internal predecessors, (280), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:27:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 311 transitions. [2022-11-22 02:27:23,604 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 311 transitions. Word has length 10 [2022-11-22 02:27:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:23,605 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 311 transitions. [2022-11-22 02:27:23,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-22 02:27:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 311 transitions. [2022-11-22 02:27:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:27:23,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:23,606 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:23,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:23,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2022-11-22 02:27:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239896700] [2022-11-22 02:27:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:23,818 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 [2022-11-22 02:27:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:23,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:23,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:27:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:24,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:24,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:24,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239896700] [2022-11-22 02:27:24,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239896700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:24,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [182014393] [2022-11-22 02:27:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:24,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:24,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:27:24,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:27:24,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-22 02:27:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:27:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:24,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:24,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [182014393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:24,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060731672] [2022-11-22 02:27:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:24,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:24,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:24,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:24,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:27:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:24,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:27:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:25,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:25,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060731672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:25,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:27:25,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-22 02:27:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254688885] [2022-11-22 02:27:25,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:27:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:27:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:27:25,346 INFO L87 Difference]: Start difference. First operand 206 states and 311 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:25,956 INFO L93 Difference]: Finished difference Result 368 states and 497 transitions. [2022-11-22 02:27:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:27:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 02:27:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:25,959 INFO L225 Difference]: With dead ends: 368 [2022-11-22 02:27:25,959 INFO L226 Difference]: Without dead ends: 368 [2022-11-22 02:27:25,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:27:25,960 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 450 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:25,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 286 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:27:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-22 02:27:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 241. [2022-11-22 02:27:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 200 states have (on average 1.655) internal successors, (331), 226 states have internal predecessors, (331), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-22 02:27:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 368 transitions. [2022-11-22 02:27:25,972 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 368 transitions. Word has length 14 [2022-11-22 02:27:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:25,973 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 368 transitions. [2022-11-22 02:27:25,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 368 transitions. [2022-11-22 02:27:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:27:25,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:25,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:25,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:26,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:26,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:26,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2022-11-22 02:27:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597937290] [2022-11-22 02:27:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:26,593 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 [2022-11-22 02:27:26,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:26,594 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (11)] Waiting until timeout for monitored process [2022-11-22 02:27:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:26,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:27:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:26,899 INFO L350 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 7 [2022-11-22 02:27:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:26,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:27,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597937290] [2022-11-22 02:27:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597937290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:27,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1206917696] [2022-11-22 02:27:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:27,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:27:27,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:27:27,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-22 02:27:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:27:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:27,560 INFO L350 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 7 [2022-11-22 02:27:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:27,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:27,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1206917696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:27,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241827455] [2022-11-22 02:27:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:27,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:27,688 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:27,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:27:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:27,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:27:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:28,130 INFO L350 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 7 [2022-11-22 02:27:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:28,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:28,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241827455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:28,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:27:28,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-22 02:27:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887993232] [2022-11-22 02:27:28,552 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:28,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:27:28,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:27:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:27:28,553 INFO L87 Difference]: Start difference. First operand 241 states and 368 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:31,267 INFO L93 Difference]: Finished difference Result 633 states and 837 transitions. [2022-11-22 02:27:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:27:31,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 02:27:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:31,271 INFO L225 Difference]: With dead ends: 633 [2022-11-22 02:27:31,271 INFO L226 Difference]: Without dead ends: 633 [2022-11-22 02:27:31,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:27:31,273 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1357 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:31,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 746 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 02:27:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-22 02:27:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 322. [2022-11-22 02:27:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 278 states have (on average 1.643884892086331) internal successors, (457), 307 states have internal predecessors, (457), 9 states have call successors, (9), 5 states have call predecessors, (9), 12 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-22 02:27:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 500 transitions. [2022-11-22 02:27:31,290 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 500 transitions. Word has length 15 [2022-11-22 02:27:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:31,291 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 500 transitions. [2022-11-22 02:27:31,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 500 transitions. [2022-11-22 02:27:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 02:27:31,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:31,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:31,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:31,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:31,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:31,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:31,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2022-11-22 02:27:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:31,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331285692] [2022-11-22 02:27:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:31,907 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 [2022-11-22 02:27:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:31,908 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:31,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Waiting until timeout for monitored process [2022-11-22 02:27:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:27:31,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:32,300 INFO L350 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 7 [2022-11-22 02:27:32,320 INFO L350 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 7 [2022-11-22 02:27:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:32,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:32,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331285692] [2022-11-22 02:27:32,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331285692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:32,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861073055] [2022-11-22 02:27:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:32,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:32,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:27:32,574 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:27:32,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-22 02:27:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:27:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:32,982 INFO L350 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 7 [2022-11-22 02:27:32,992 INFO L350 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 7 [2022-11-22 02:27:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:33,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:33,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861073055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63876889] [2022-11-22 02:27:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:33,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:33,118 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:27:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:27:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:33,655 INFO L350 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 7 [2022-11-22 02:27:33,661 INFO L350 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 7 [2022-11-22 02:27:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:33,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63876889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:34,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:27:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-22 02:27:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481201463] [2022-11-22 02:27:34,167 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:27:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:27:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:27:34,168 INFO L87 Difference]: Start difference. First operand 322 states and 500 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:37,276 INFO L93 Difference]: Finished difference Result 849 states and 1156 transitions. [2022-11-22 02:27:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:27:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 02:27:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:37,281 INFO L225 Difference]: With dead ends: 849 [2022-11-22 02:27:37,282 INFO L226 Difference]: Without dead ends: 849 [2022-11-22 02:27:37,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:27:37,283 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1112 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:37,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1112 Valid, 846 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 02:27:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-22 02:27:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 433. [2022-11-22 02:27:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 383 states have (on average 1.6631853785900783) internal successors, (637), 414 states have internal predecessors, (637), 11 states have call successors, (11), 7 states have call predecessors, (11), 16 states have return successors, (48), 11 states have call predecessors, (48), 11 states have call successors, (48) [2022-11-22 02:27:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 696 transitions. [2022-11-22 02:27:37,308 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 696 transitions. Word has length 16 [2022-11-22 02:27:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:37,308 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 696 transitions. [2022-11-22 02:27:37,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 696 transitions. [2022-11-22 02:27:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:27:37,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:37,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:37,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:37,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:37,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:37,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:37,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:37,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2022-11-22 02:27:37,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:37,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686645922] [2022-11-22 02:27:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:37,914 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 [2022-11-22 02:27:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:37,915 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:37,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (17)] Waiting until timeout for monitored process [2022-11-22 02:27:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:27:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:38,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:38,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686645922] [2022-11-22 02:27:38,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686645922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:38,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:27:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209960029] [2022-11-22 02:27:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:38,037 INFO L87 Difference]: Start difference. First operand 433 states and 696 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-22 02:27:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:38,080 INFO L93 Difference]: Finished difference Result 583 states and 924 transitions. [2022-11-22 02:27:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2022-11-22 02:27:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:38,084 INFO L225 Difference]: With dead ends: 583 [2022-11-22 02:27:38,084 INFO L226 Difference]: Without dead ends: 583 [2022-11-22 02:27:38,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:38,085 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:38,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 119 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:27:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-22 02:27:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 565. [2022-11-22 02:27:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 504 states have (on average 1.6468253968253967) internal successors, (830), 539 states have internal predecessors, (830), 15 states have call successors, (15), 10 states have call predecessors, (15), 23 states have return successors, (75), 15 states have call predecessors, (75), 15 states have call successors, (75) [2022-11-22 02:27:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 920 transitions. [2022-11-22 02:27:38,106 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 920 transitions. Word has length 18 [2022-11-22 02:27:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:38,107 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 920 transitions. [2022-11-22 02:27:38,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-22 02:27:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 920 transitions. [2022-11-22 02:27:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:27:38,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:38,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:38,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:38,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:38,320 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2022-11-22 02:27:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548942418] [2022-11-22 02:27:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:38,321 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 [2022-11-22 02:27:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:38,322 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:38,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:27:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:38,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:38,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548942418] [2022-11-22 02:27:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548942418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:38,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:38,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:27:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753885572] [2022-11-22 02:27:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:38,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:38,485 INFO L87 Difference]: Start difference. First operand 565 states and 920 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-22 02:27:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:38,544 INFO L93 Difference]: Finished difference Result 608 states and 938 transitions. [2022-11-22 02:27:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2022-11-22 02:27:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:38,548 INFO L225 Difference]: With dead ends: 608 [2022-11-22 02:27:38,548 INFO L226 Difference]: Without dead ends: 608 [2022-11-22 02:27:38,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:38,549 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:38,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 120 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:27:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-22 02:27:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 584. [2022-11-22 02:27:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 520 states have (on average 1.6211538461538462) internal successors, (843), 557 states have internal predecessors, (843), 15 states have call successors, (15), 11 states have call predecessors, (15), 26 states have return successors, (65), 15 states have call predecessors, (65), 15 states have call successors, (65) [2022-11-22 02:27:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 923 transitions. [2022-11-22 02:27:38,567 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 923 transitions. Word has length 18 [2022-11-22 02:27:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:38,568 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 923 transitions. [2022-11-22 02:27:38,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-22 02:27:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 923 transitions. [2022-11-22 02:27:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:27:38,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:38,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:38,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:38,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:38,782 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:38,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2022-11-22 02:27:38,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:38,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920213954] [2022-11-22 02:27:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:38,783 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 [2022-11-22 02:27:38,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:38,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:38,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:27:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:38,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:38,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920213954] [2022-11-22 02:27:38,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920213954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:38,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:38,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:27:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400915884] [2022-11-22 02:27:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:38,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:38,963 INFO L87 Difference]: Start difference. First operand 584 states and 923 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-11-22 02:27:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:39,030 INFO L93 Difference]: Finished difference Result 599 states and 922 transitions. [2022-11-22 02:27:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:39,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2022-11-22 02:27:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:39,034 INFO L225 Difference]: With dead ends: 599 [2022-11-22 02:27:39,035 INFO L226 Difference]: Without dead ends: 599 [2022-11-22 02:27:39,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:39,036 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:39,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:27:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-22 02:27:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 584. [2022-11-22 02:27:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 520 states have (on average 1.6115384615384616) internal successors, (838), 557 states have internal predecessors, (838), 15 states have call successors, (15), 11 states have call predecessors, (15), 26 states have return successors, (65), 15 states have call predecessors, (65), 15 states have call successors, (65) [2022-11-22 02:27:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 918 transitions. [2022-11-22 02:27:39,056 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 918 transitions. Word has length 19 [2022-11-22 02:27:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:39,056 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 918 transitions. [2022-11-22 02:27:39,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-11-22 02:27:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 918 transitions. [2022-11-22 02:27:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 02:27:39,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:39,058 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 02:27:39,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:39,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:39,271 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1621609206, now seen corresponding path program 2 times [2022-11-22 02:27:39,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:39,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381605418] [2022-11-22 02:27:39,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:27:39,272 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 [2022-11-22 02:27:39,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:39,273 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:39,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:39,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:27:39,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:27:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:39,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:40,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381605418] [2022-11-22 02:27:40,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381605418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1026489078] [2022-11-22 02:27:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:27:40,466 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:40,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:27:40,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:27:40,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-22 02:27:40,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:27:40,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:27:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:40,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:40,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1026489078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:40,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869550003] [2022-11-22 02:27:40,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:27:40,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:40,919 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:40,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:27:40,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:27:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:27:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:27:41,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:41,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:41,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869550003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:41,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:27:41,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-22 02:27:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280515929] [2022-11-22 02:27:41,099 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:41,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:27:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:27:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:27:41,100 INFO L87 Difference]: Start difference. First operand 584 states and 918 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:42,356 INFO L93 Difference]: Finished difference Result 687 states and 965 transitions. [2022-11-22 02:27:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:27:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 02:27:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:42,359 INFO L225 Difference]: With dead ends: 687 [2022-11-22 02:27:42,360 INFO L226 Difference]: Without dead ends: 687 [2022-11-22 02:27:42,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:27:42,361 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 419 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:42,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1079 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:27:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-11-22 02:27:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 488. [2022-11-22 02:27:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 424 states have (on average 1.5235849056603774) internal successors, (646), 461 states have internal predecessors, (646), 15 states have call successors, (15), 11 states have call predecessors, (15), 26 states have return successors, (57), 15 states have call predecessors, (57), 15 states have call successors, (57) [2022-11-22 02:27:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 718 transitions. [2022-11-22 02:27:42,379 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 718 transitions. Word has length 22 [2022-11-22 02:27:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 718 transitions. [2022-11-22 02:27:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:27:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 718 transitions. [2022-11-22 02:27:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 02:27:42,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:42,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:42,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:42,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:42,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:42,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2022-11-22 02:27:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625079556] [2022-11-22 02:27:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:42,986 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 [2022-11-22 02:27:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:42,987 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:43,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:27:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:43,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:27:43,087 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:43,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625079556] [2022-11-22 02:27:43,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625079556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:27:43,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:27:43,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:27:43,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575802696] [2022-11-22 02:27:43,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:27:43,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:27:43,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:27:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:43,089 INFO L87 Difference]: Start difference. First operand 488 states and 718 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:27:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:27:43,096 INFO L93 Difference]: Finished difference Result 365 states and 523 transitions. [2022-11-22 02:27:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:27:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-22 02:27:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:27:43,110 INFO L225 Difference]: With dead ends: 365 [2022-11-22 02:27:43,110 INFO L226 Difference]: Without dead ends: 365 [2022-11-22 02:27:43,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:27:43,111 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 13 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:27:43,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:27:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-22 02:27:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-11-22 02:27:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 313 states have (on average 1.5143769968051117) internal successors, (474), 345 states have internal predecessors, (474), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-11-22 02:27:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 523 transitions. [2022-11-22 02:27:43,122 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 523 transitions. Word has length 25 [2022-11-22 02:27:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:27:43,122 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 523 transitions. [2022-11-22 02:27:43,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:27:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 523 transitions. [2022-11-22 02:27:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:27:43,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:27:43,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:27:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:27:43,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:43,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:27:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:27:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2022-11-22 02:27:43,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:27:43,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908430972] [2022-11-22 02:27:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:43,337 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 [2022-11-22 02:27:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:27:43,338 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:27:43,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:27:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:27:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:45,885 INFO L350 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 12 treesize of output 14 [2022-11-22 02:27:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:45,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:47,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:27:47,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908430972] [2022-11-22 02:27:47,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908430972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:47,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [213592637] [2022-11-22 02:27:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:47,565 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:27:47,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:27:47,568 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:27:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-22 02:27:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:27:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:50,181 INFO L350 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 12 treesize of output 14 [2022-11-22 02:27:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:50,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:51,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [213592637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:27:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450150680] [2022-11-22 02:27:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:27:51,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:27:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:27:51,262 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:27:51,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 02:27:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:27:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:27:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:27:53,692 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:27:53,693 INFO L350 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 [2022-11-22 02:27:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:27:54,311 INFO L350 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 12 treesize of output 14 [2022-11-22 02:27:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:54,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:27:54,552 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:27:54,552 INFO L350 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 15 treesize of output 14 [2022-11-22 02:27:57,522 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:27:57,522 INFO L350 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 15 treesize of output 14 [2022-11-22 02:27:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:27:59,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450150680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:27:59,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 02:27:59,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-11-22 02:27:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547241957] [2022-11-22 02:27:59,751 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:27:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:27:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:27:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=152, Unknown=8, NotChecked=0, Total=210 [2022-11-22 02:27:59,752 INFO L87 Difference]: Start difference. First operand 365 states and 523 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:02,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:06,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:08,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:10,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:20,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:25,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:27,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:29,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:35,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:37,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:39,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:41,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:44,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:28:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:50,687 INFO L93 Difference]: Finished difference Result 498 states and 668 transitions. [2022-11-22 02:28:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:28:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-22 02:28:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:50,691 INFO L225 Difference]: With dead ends: 498 [2022-11-22 02:28:50,691 INFO L226 Difference]: Without dead ends: 498 [2022-11-22 02:28:50,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=248, Invalid=546, Unknown=18, NotChecked=0, Total=812 [2022-11-22 02:28:50,692 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 623 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 117 mSolverCounterUnsat, 54 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 54 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:50,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 134 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 153 Invalid, 54 Unknown, 0 Unchecked, 27.2s Time] [2022-11-22 02:28:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-22 02:28:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 378. [2022-11-22 02:28:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 326 states have (on average 1.392638036809816) internal successors, (454), 356 states have internal predecessors, (454), 12 states have call successors, (12), 9 states have call predecessors, (12), 20 states have return successors, (47), 12 states have call predecessors, (47), 12 states have call successors, (47) [2022-11-22 02:28:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 513 transitions. [2022-11-22 02:28:50,709 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 513 transitions. Word has length 27 [2022-11-22 02:28:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:50,710 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 513 transitions. [2022-11-22 02:28:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:28:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 513 transitions. [2022-11-22 02:28:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:28:50,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:50,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:50,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:50,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-22 02:28:51,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:28:51,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:28:51,319 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:28:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2022-11-22 02:28:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:28:51,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898551197] [2022-11-22 02:28:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:51,320 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 [2022-11-22 02:28:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:28:51,321 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:28:51,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (27)] Waiting until timeout for monitored process [2022-11-22 02:28:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:51,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:28:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:28:51,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:28:51,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:28:51,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898551197] [2022-11-22 02:28:51,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898551197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:51,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:28:51,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:28:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137026113] [2022-11-22 02:28:51,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:51,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:28:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:28:51,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:28:51,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:28:51,753 INFO L87 Difference]: Start difference. First operand 378 states and 513 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:28:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:52,090 INFO L93 Difference]: Finished difference Result 436 states and 576 transitions. [2022-11-22 02:28:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:28:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-22 02:28:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:52,093 INFO L225 Difference]: With dead ends: 436 [2022-11-22 02:28:52,093 INFO L226 Difference]: Without dead ends: 436 [2022-11-22 02:28:52,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:28:52,094 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 125 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:52,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 215 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:28:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-22 02:28:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 377. [2022-11-22 02:28:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 326 states have (on average 1.3865030674846626) internal successors, (452), 355 states have internal predecessors, (452), 12 states have call successors, (12), 9 states have call predecessors, (12), 19 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2022-11-22 02:28:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 506 transitions. [2022-11-22 02:28:52,110 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 506 transitions. Word has length 28 [2022-11-22 02:28:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:52,110 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 506 transitions. [2022-11-22 02:28:52,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:28:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 506 transitions. [2022-11-22 02:28:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:28:52,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:52,112 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:28:52,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:52,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:28:52,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:28:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2022-11-22 02:28:52,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:28:52,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138712175] [2022-11-22 02:28:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:52,326 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 [2022-11-22 02:28:52,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:28:52,327 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:28:52,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:28:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:52,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:28:52,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:28:55,236 INFO L350 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 12 treesize of output 14 [2022-11-22 02:28:55,407 INFO L350 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 7 [2022-11-22 02:28:55,418 INFO L350 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 7 [2022-11-22 02:28:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:28:55,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:57,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:28:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138712175] [2022-11-22 02:28:57,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138712175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45577374] [2022-11-22 02:28:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:57,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:28:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:28:57,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:28:57,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-22 02:28:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:28:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:02,886 INFO L350 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 12 treesize of output 14 [2022-11-22 02:29:03,005 INFO L350 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 7 [2022-11-22 02:29:03,010 INFO L350 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 7 [2022-11-22 02:29:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:03,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:05,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45577374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436556689] [2022-11-22 02:29:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:05,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:05,345 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:05,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 02:29:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:29:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:08,106 INFO L350 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 12 treesize of output 14 [2022-11-22 02:29:08,198 INFO L350 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 7 [2022-11-22 02:29:08,205 INFO L350 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 7 [2022-11-22 02:29:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:08,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:10,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436556689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:10,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:29:10,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-22 02:29:10,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671073777] [2022-11-22 02:29:10,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:29:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:29:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:29:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:29:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-22 02:29:10,532 INFO L87 Difference]: Start difference. First operand 377 states and 506 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:29:13,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:29:36,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:29:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:42,556 INFO L93 Difference]: Finished difference Result 433 states and 567 transitions. [2022-11-22 02:29:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:29:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-22 02:29:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:42,559 INFO L225 Difference]: With dead ends: 433 [2022-11-22 02:29:42,560 INFO L226 Difference]: Without dead ends: 433 [2022-11-22 02:29:42,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=197, Invalid=486, Unknown=19, NotChecked=0, Total=702 [2022-11-22 02:29:42,561 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 204 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 32 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:42,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 198 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 225 Invalid, 27 Unknown, 0 Unchecked, 5.0s Time] [2022-11-22 02:29:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-22 02:29:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 378. [2022-11-22 02:29:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 327 states have (on average 1.3669724770642202) internal successors, (447), 356 states have internal predecessors, (447), 12 states have call successors, (12), 9 states have call predecessors, (12), 19 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2022-11-22 02:29:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 501 transitions. [2022-11-22 02:29:42,575 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 501 transitions. Word has length 29 [2022-11-22 02:29:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:42,575 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 501 transitions. [2022-11-22 02:29:42,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:29:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 501 transitions. [2022-11-22 02:29:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 02:29:42,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:42,577 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] [2022-11-22 02:29:42,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-22 02:29:42,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:29:42,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-22 02:29:43,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:43,180 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:29:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2022-11-22 02:29:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:29:43,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201676724] [2022-11-22 02:29:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:43,182 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 [2022-11-22 02:29:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:29:43,183 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:29:43,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:29:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:29:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:43,412 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)))) is different from true [2022-11-22 02:29:43,481 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:29:43,482 INFO L350 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 [2022-11-22 02:29:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:43,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:43,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:29:43,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201676724] [2022-11-22 02:29:43,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201676724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:29:43,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798550887] [2022-11-22 02:29:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:43,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:29:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:29:43,972 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:29:43,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-22 02:29:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:44,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:29:44,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:44,404 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:29:44,404 INFO L350 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 [2022-11-22 02:29:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:44,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:44,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1798550887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:29:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224906138] [2022-11-22 02:29:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:44,798 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:44,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 02:29:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:29:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:44,993 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_50 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_50))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:29:45,135 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:29:45,136 INFO L350 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 [2022-11-22 02:29:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:45,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224906138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:29:45,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:29:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-22 02:29:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505938929] [2022-11-22 02:29:45,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:29:45,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:29:45,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:29:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:29:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=51, Unknown=2, NotChecked=30, Total=110 [2022-11-22 02:29:45,591 INFO L87 Difference]: Start difference. First operand 378 states and 501 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:29:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:52,677 INFO L93 Difference]: Finished difference Result 513 states and 641 transitions. [2022-11-22 02:29:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:29:52,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-22 02:29:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:52,681 INFO L225 Difference]: With dead ends: 513 [2022-11-22 02:29:52,681 INFO L226 Difference]: Without dead ends: 513 [2022-11-22 02:29:52,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 157 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=120, Invalid=264, Unknown=4, NotChecked=74, Total=462 [2022-11-22 02:29:52,682 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 345 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:52,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 253 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 187 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-11-22 02:29:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-22 02:29:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 450. [2022-11-22 02:29:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 396 states have (on average 1.3282828282828283) internal successors, (526), 426 states have internal predecessors, (526), 12 states have call successors, (12), 11 states have call predecessors, (12), 22 states have return successors, (41), 12 states have call predecessors, (41), 12 states have call successors, (41) [2022-11-22 02:29:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 579 transitions. [2022-11-22 02:29:52,703 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 579 transitions. Word has length 30 [2022-11-22 02:29:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:52,705 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 579 transitions. [2022-11-22 02:29:52,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:29:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 579 transitions. [2022-11-22 02:29:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 02:29:52,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:52,706 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, 1] [2022-11-22 02:29:52,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:29:52,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-22 02:29:53,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-22 02:29:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:53,320 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:29:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2022-11-22 02:29:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:29:53,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975689245] [2022-11-22 02:29:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:53,322 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 [2022-11-22 02:29:53,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:29:53,323 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:29:53,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:29:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:29:53,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:53,624 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_56 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_56))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:29:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:53,727 INFO L350 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 12 treesize of output 14 [2022-11-22 02:29:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:53,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:54,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:29:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975689245] [2022-11-22 02:29:54,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975689245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:54,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [426374155] [2022-11-22 02:29:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:54,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:29:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:29:54,320 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:29:54,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-22 02:29:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:29:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:54,748 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_62 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_62))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:29:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:54,837 INFO L350 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 12 treesize of output 14 [2022-11-22 02:29:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:54,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:55,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [426374155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099693848] [2022-11-22 02:29:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:55,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:29:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:29:55,159 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:29:55,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-22 02:29:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:29:55,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:55,391 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_68 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_68))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:29:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:29:55,478 INFO L350 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 12 treesize of output 14 [2022-11-22 02:29:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:55,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:55,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099693848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:29:55,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:29:55,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-11-22 02:29:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532057451] [2022-11-22 02:29:55,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:29:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:29:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:29:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:29:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=84, Unknown=3, NotChecked=60, Total=182 [2022-11-22 02:29:55,827 INFO L87 Difference]: Start difference. First operand 450 states and 579 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:29:56,847 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_56 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_56))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_68 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_68))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_62 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_62))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|))))) is different from true [2022-11-22 02:29:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:29:57,014 INFO L93 Difference]: Finished difference Result 630 states and 754 transitions. [2022-11-22 02:29:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:29:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-22 02:29:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:29:57,017 INFO L225 Difference]: With dead ends: 630 [2022-11-22 02:29:57,018 INFO L226 Difference]: Without dead ends: 630 [2022-11-22 02:29:57,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=294, Unknown=4, NotChecked=164, Total=600 [2022-11-22 02:29:57,019 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 333 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:29:57,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 224 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 175 Invalid, 0 Unknown, 411 Unchecked, 0.6s Time] [2022-11-22 02:29:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-11-22 02:29:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 562. [2022-11-22 02:29:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 503 states have (on average 1.320079522862823) internal successors, (664), 537 states have internal predecessors, (664), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (35), 12 states have call predecessors, (35), 12 states have call successors, (35) [2022-11-22 02:29:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 711 transitions. [2022-11-22 02:29:57,036 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 711 transitions. Word has length 31 [2022-11-22 02:29:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:29:57,036 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 711 transitions. [2022-11-22 02:29:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 02:29:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 711 transitions. [2022-11-22 02:29:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 02:29:57,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:29:57,038 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, 1, 1, 1, 1] [2022-11-22 02:29:57,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-22 02:29:57,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-22 02:29:57,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:29:57,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:29:57,645 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:29:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:29:57,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2022-11-22 02:29:57,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:29:57,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688332136] [2022-11-22 02:29:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:57,646 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 [2022-11-22 02:29:57,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:29:57,647 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:29:57,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:29:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:29:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:29:58,736 INFO L350 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 [2022-11-22 02:29:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:58,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:29:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:29:59,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:29:59,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688332136] [2022-11-22 02:29:59,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688332136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:29:59,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050458664] [2022-11-22 02:29:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:29:59,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:29:59,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:29:59,736 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:29:59,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-22 02:29:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:29:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:29:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:00,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 32 [2022-11-22 02:30:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:30:00,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:01,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050458664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:30:01,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495095082] [2022-11-22 02:30:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:01,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:30:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:30:01,062 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:30:01,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-22 02:30:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:30:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:03,157 INFO L350 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 [2022-11-22 02:30:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:03,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:05,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495095082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:05,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-22 02:30:05,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 8, 8] total 31 [2022-11-22 02:30:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674343038] [2022-11-22 02:30:05,816 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-22 02:30:05,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:30:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:30:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:30:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:30:05,818 INFO L87 Difference]: Start difference. First operand 562 states and 711 transitions. Second operand has 32 states, 32 states have (on average 4.6875) internal successors, (150), 27 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:30:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:30:17,065 INFO L93 Difference]: Finished difference Result 468 states and 564 transitions. [2022-11-22 02:30:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 02:30:17,066 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 27 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-11-22 02:30:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:30:17,068 INFO L225 Difference]: With dead ends: 468 [2022-11-22 02:30:17,068 INFO L226 Difference]: Without dead ends: 468 [2022-11-22 02:30:17,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 02:30:17,069 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1069 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:30:17,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 762 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-22 02:30:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-22 02:30:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 375. [2022-11-22 02:30:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 330 states have (on average 1.3636363636363635) internal successors, (450), 358 states have internal predecessors, (450), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-22 02:30:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 479 transitions. [2022-11-22 02:30:17,080 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 479 transitions. Word has length 36 [2022-11-22 02:30:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:30:17,081 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 479 transitions. [2022-11-22 02:30:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 27 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:30:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 479 transitions. [2022-11-22 02:30:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:30:17,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:30:17,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:30:17,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-22 02:30:17,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:30:17,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-22 02:30:17,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:30:17,690 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:30:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:30:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2022-11-22 02:30:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:30:17,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944618424] [2022-11-22 02:30:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:17,691 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 [2022-11-22 02:30:17,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:30:17,692 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:30:17,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:30:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:30:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:17,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:18,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:30:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944618424] [2022-11-22 02:30:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944618424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368700195] [2022-11-22 02:30:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:18,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:30:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:30:18,032 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:30:18,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-22 02:30:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:18,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:30:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:18,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368700195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:18,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002932807] [2022-11-22 02:30:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:30:18,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:30:18,411 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:30:18,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-22 02:30:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:30:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:18,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002932807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:18,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:30:18,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-22 02:30:18,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466225683] [2022-11-22 02:30:18,755 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:30:18,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:30:18,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:30:18,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:30:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:30:18,757 INFO L87 Difference]: Start difference. First operand 375 states and 479 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:30:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:30:18,828 INFO L93 Difference]: Finished difference Result 374 states and 471 transitions. [2022-11-22 02:30:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:30:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-22 02:30:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:30:18,831 INFO L225 Difference]: With dead ends: 374 [2022-11-22 02:30:18,831 INFO L226 Difference]: Without dead ends: 374 [2022-11-22 02:30:18,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:30:18,834 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 54 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:30:18,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 108 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:30:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-22 02:30:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 362. [2022-11-22 02:30:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 320 states have (on average 1.33125) internal successors, (426), 345 states have internal predecessors, (426), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-22 02:30:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 455 transitions. [2022-11-22 02:30:18,847 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 455 transitions. Word has length 40 [2022-11-22 02:30:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:30:18,848 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 455 transitions. [2022-11-22 02:30:18,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:30:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 455 transitions. [2022-11-22 02:30:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:30:18,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:30:18,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:30:18,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-22 02:30:19,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-22 02:30:19,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:30:19,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:30:19,458 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:30:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:30:19,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2022-11-22 02:30:19,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:30:19,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252286051] [2022-11-22 02:30:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:19,459 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 [2022-11-22 02:30:19,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:30:19,460 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:30:19,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (43)] Waiting until timeout for monitored process [2022-11-22 02:30:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:30:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:19,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:20,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:30:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252286051] [2022-11-22 02:30:20,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252286051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:20,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [147264828] [2022-11-22 02:30:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:30:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:30:20,179 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:30:20,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-22 02:30:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:30:20,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:20,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:20,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [147264828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:20,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3511679] [2022-11-22 02:30:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:20,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:30:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:30:20,614 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:30:20,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-22 02:30:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:20,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:30:20,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:20,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:21,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3511679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:21,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:30:21,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-22 02:30:21,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340360390] [2022-11-22 02:30:21,022 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:30:21,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:30:21,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:30:21,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:30:21,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:30:21,024 INFO L87 Difference]: Start difference. First operand 362 states and 455 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:30:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:30:21,295 INFO L93 Difference]: Finished difference Result 327 states and 391 transitions. [2022-11-22 02:30:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:30:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-22 02:30:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:30:21,298 INFO L225 Difference]: With dead ends: 327 [2022-11-22 02:30:21,298 INFO L226 Difference]: Without dead ends: 327 [2022-11-22 02:30:21,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:30:21,300 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 109 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:30:21,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 140 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:30:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-22 02:30:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2022-11-22 02:30:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 281 states have (on average 1.2811387900355873) internal successors, (360), 300 states have internal predecessors, (360), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-22 02:30:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 382 transitions. [2022-11-22 02:30:21,309 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 382 transitions. Word has length 41 [2022-11-22 02:30:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:30:21,309 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 382 transitions. [2022-11-22 02:30:21,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:30:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 382 transitions. [2022-11-22 02:30:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:30:21,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:30:21,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:30:21,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-22 02:30:21,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-22 02:30:21,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (43)] Ended with exit code 0 [2022-11-22 02:30:21,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:30:21,914 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:30:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:30:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -93932646, now seen corresponding path program 1 times [2022-11-22 02:30:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:30:21,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125836495] [2022-11-22 02:30:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:21,915 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 [2022-11-22 02:30:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:30:21,916 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:30:21,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (46)] Waiting until timeout for monitored process [2022-11-22 02:30:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:30:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:24,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:30:24,707 INFO L350 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 12 treesize of output 14 [2022-11-22 02:30:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:25,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:26,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:30:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125836495] [2022-11-22 02:30:26,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125836495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:30:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [6621963] [2022-11-22 02:30:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:26,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:30:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:30:26,277 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:30:26,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-22 02:30:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:30:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:30:29,089 INFO L350 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 12 treesize of output 14 [2022-11-22 02:30:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:29,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:32,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [6621963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:30:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332248690] [2022-11-22 02:30:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:30:32,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:30:32,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:30:32,200 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:30:32,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-22 02:30:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:30:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:30:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:30:34,715 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:30:34,715 INFO L350 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 [2022-11-22 02:30:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:30:35,267 INFO L350 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 12 treesize of output 14 [2022-11-22 02:30:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:35,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:30:36,129 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:30:36,130 INFO L350 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 15 treesize of output 14 [2022-11-22 02:30:39,034 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:30:39,034 INFO L350 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 15 treesize of output 14 [2022-11-22 02:30:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:30:41,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332248690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:30:41,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 02:30:41,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-11-22 02:30:41,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658182073] [2022-11-22 02:30:41,234 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 02:30:41,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:30:41,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:30:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:30:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=203, Unknown=10, NotChecked=0, Total=272 [2022-11-22 02:30:41,236 INFO L87 Difference]: Start difference. First operand 315 states and 382 transitions. Second operand has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:30:50,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:30:54,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:30:56,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:30:58,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:07,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:09,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:12,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:14,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:16,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:31:16,663 INFO L93 Difference]: Finished difference Result 358 states and 419 transitions. [2022-11-22 02:31:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:31:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-11-22 02:31:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:31:16,665 INFO L225 Difference]: With dead ends: 358 [2022-11-22 02:31:16,665 INFO L226 Difference]: Without dead ends: 358 [2022-11-22 02:31:16,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=241, Invalid=613, Unknown=16, NotChecked=0, Total=870 [2022-11-22 02:31:16,666 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 403 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 76 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:31:16,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 185 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 260 Invalid, 40 Unknown, 0 Unchecked, 19.3s Time] [2022-11-22 02:31:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-22 02:31:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 313. [2022-11-22 02:31:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 281 states have (on average 1.2526690391459074) internal successors, (352), 298 states have internal predecessors, (352), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-22 02:31:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 374 transitions. [2022-11-22 02:31:16,679 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 374 transitions. Word has length 41 [2022-11-22 02:31:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:31:16,680 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 374 transitions. [2022-11-22 02:31:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:31:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 374 transitions. [2022-11-22 02:31:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:31:16,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:31:16,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:31:16,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (46)] Forceful destruction successful, exit code 0 [2022-11-22 02:31:16,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-22 02:31:17,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-22 02:31:17,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:31:17,295 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:31:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:31:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2022-11-22 02:31:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:31:17,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895102350] [2022-11-22 02:31:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:17,296 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 [2022-11-22 02:31:17,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:31:17,297 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:31:17,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (49)] Waiting until timeout for monitored process [2022-11-22 02:31:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:31:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:17,458 INFO L350 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 [2022-11-22 02:31:17,590 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:31:17,590 INFO L350 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 [2022-11-22 02:31:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:17,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:17,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:31:17,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895102350] [2022-11-22 02:31:17,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895102350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:31:17,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715592995] [2022-11-22 02:31:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:17,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:31:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:31:17,837 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:31:17,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-22 02:31:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:31:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:18,163 INFO L350 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 [2022-11-22 02:31:18,291 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:31:18,291 INFO L350 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 [2022-11-22 02:31:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:18,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:18,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715592995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:31:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958452011] [2022-11-22 02:31:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:18,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:31:18,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:31:18,524 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:31:18,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-22 02:31:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:31:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:18,645 INFO L350 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 [2022-11-22 02:31:18,790 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:31:18,791 INFO L350 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 [2022-11-22 02:31:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:18,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958452011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:31:19,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:31:19,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-22 02:31:19,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632053064] [2022-11-22 02:31:19,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:31:19,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:31:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:31:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:31:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:31:19,010 INFO L87 Difference]: Start difference. First operand 313 states and 374 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:31:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:31:19,278 INFO L93 Difference]: Finished difference Result 328 states and 382 transitions. [2022-11-22 02:31:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:31:19,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-11-22 02:31:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:31:19,280 INFO L225 Difference]: With dead ends: 328 [2022-11-22 02:31:19,280 INFO L226 Difference]: Without dead ends: 328 [2022-11-22 02:31:19,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:31:19,281 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:31:19,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:31:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-22 02:31:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 313. [2022-11-22 02:31:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 281 states have (on average 1.2384341637010676) internal successors, (348), 298 states have internal predecessors, (348), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-22 02:31:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2022-11-22 02:31:19,290 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 42 [2022-11-22 02:31:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:31:19,290 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2022-11-22 02:31:19,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:31:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2022-11-22 02:31:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:31:19,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:31:19,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:31:19,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (49)] Forceful destruction successful, exit code 0 [2022-11-22 02:31:19,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-22 02:31:19,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-22 02:31:19,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:31:19,906 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:31:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:31:19,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1418260067, now seen corresponding path program 1 times [2022-11-22 02:31:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:31:19,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718206956] [2022-11-22 02:31:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:19,907 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 [2022-11-22 02:31:19,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:31:19,908 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:31:19,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (52)] Waiting until timeout for monitored process [2022-11-22 02:31:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:20,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:31:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:31:20,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:31:20,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:31:20,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718206956] [2022-11-22 02:31:20,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718206956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:31:20,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:31:20,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:31:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997316270] [2022-11-22 02:31:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:31:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:31:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:31:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:31:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:31:20,061 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:31:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:31:20,067 INFO L93 Difference]: Finished difference Result 296 states and 340 transitions. [2022-11-22 02:31:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:31:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-22 02:31:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:31:20,078 INFO L225 Difference]: With dead ends: 296 [2022-11-22 02:31:20,079 INFO L226 Difference]: Without dead ends: 296 [2022-11-22 02:31:20,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:31:20,080 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:31:20,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:31:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-22 02:31:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 289. [2022-11-22 02:31:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 274 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:31:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2022-11-22 02:31:20,089 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 47 [2022-11-22 02:31:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:31:20,090 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2022-11-22 02:31:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:31:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2022-11-22 02:31:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:31:20,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:31:20,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:31:20,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (52)] Forceful destruction successful, exit code 0 [2022-11-22 02:31:20,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:31:20,305 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:31:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:31:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2022-11-22 02:31:20,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:31:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282737820] [2022-11-22 02:31:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:20,305 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 [2022-11-22 02:31:20,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:31:20,306 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:31:20,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (53)] Waiting until timeout for monitored process [2022-11-22 02:31:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:31:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:20,955 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:31:20,955 INFO L350 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 [2022-11-22 02:31:23,779 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-22 02:31:23,779 INFO L350 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 2 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 38 [2022-11-22 02:31:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:23,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:24,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:31:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282737820] [2022-11-22 02:31:24,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282737820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:31:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2094860506] [2022-11-22 02:31:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:24,072 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:31:24,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:31:24,073 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:31:24,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-22 02:31:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:24,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:31:24,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:24,854 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-22 02:31:24,855 INFO L350 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 20 treesize of output 22 [2022-11-22 02:31:25,255 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:31:25,255 INFO L350 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 [2022-11-22 02:31:25,357 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:31:25,358 INFO L350 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 24 [2022-11-22 02:31:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:25,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:25,696 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:31:25,697 INFO L350 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 66 treesize of output 63 [2022-11-22 02:31:31,148 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:31:31,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-11-22 02:31:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:31,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2094860506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:31:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408446724] [2022-11-22 02:31:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:31,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:31:31,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:31:31,848 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:31:31,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-22 02:31:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:31:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:32,084 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:31:32,084 INFO L350 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 [2022-11-22 02:31:32,565 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:31:32,565 INFO L350 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 [2022-11-22 02:31:32,651 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:31:32,652 INFO L350 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 24 [2022-11-22 02:31:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:32,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:31:32,882 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:31:32,882 INFO L350 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 128 treesize of output 123 [2022-11-22 02:31:39,911 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:31:39,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-11-22 02:31:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:31:40,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408446724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:31:40,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-22 02:31:40,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 7, 8] total 31 [2022-11-22 02:31:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691912041] [2022-11-22 02:31:40,116 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-22 02:31:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:31:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:31:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:31:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=867, Unknown=7, NotChecked=0, Total=1056 [2022-11-22 02:31:40,118 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 32 states, 29 states have (on average 5.9655172413793105) internal successors, (173), 30 states have internal predecessors, (173), 7 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:31:51,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:31:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:31:58,433 INFO L93 Difference]: Finished difference Result 299 states and 342 transitions. [2022-11-22 02:31:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:31:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 5.9655172413793105) internal successors, (173), 30 states have internal predecessors, (173), 7 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2022-11-22 02:31:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:31:58,436 INFO L225 Difference]: With dead ends: 299 [2022-11-22 02:31:58,436 INFO L226 Difference]: Without dead ends: 299 [2022-11-22 02:31:58,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 221 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=453, Invalid=1346, Unknown=7, NotChecked=0, Total=1806 [2022-11-22 02:31:58,437 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 322 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 121 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:31:58,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 178 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 02:31:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-22 02:31:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 288. [2022-11-22 02:31:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1870229007633588) internal successors, (311), 273 states have internal predecessors, (311), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:31:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 331 transitions. [2022-11-22 02:31:58,444 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 331 transitions. Word has length 51 [2022-11-22 02:31:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:31:58,445 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 331 transitions. [2022-11-22 02:31:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 5.9655172413793105) internal successors, (173), 30 states have internal predecessors, (173), 7 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:31:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 331 transitions. [2022-11-22 02:31:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:31:58,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:31:58,446 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:31:58,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (53)] Forceful destruction successful, exit code 0 [2022-11-22 02:31:58,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-22 02:31:58,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-22 02:31:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:31:59,061 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:31:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:31:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2022-11-22 02:31:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:31:59,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647381574] [2022-11-22 02:31:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:31:59,062 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 [2022-11-22 02:31:59,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:31:59,062 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:31:59,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (56)] Waiting until timeout for monitored process [2022-11-22 02:31:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:31:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:31:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:31:59,336 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_186 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_186))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:31:59,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:31:59,447 INFO L350 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 [2022-11-22 02:31:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 2 not checked. [2022-11-22 02:31:59,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:32:00,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:32:00,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647381574] [2022-11-22 02:32:00,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647381574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:00,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [202184803] [2022-11-22 02:32:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:32:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:32:00,270 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:32:00,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-22 02:32:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:32:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:00,708 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)))) is different from true [2022-11-22 02:32:00,788 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 02:32:00,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-22 02:32:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 2 not checked. [2022-11-22 02:32:01,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:32:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [202184803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626475378] [2022-11-22 02:32:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:01,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:01,660 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:01,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-22 02:32:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:32:01,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:01,883 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_196 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_196))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:32:01,992 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:32:01,992 INFO L350 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 [2022-11-22 02:32:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 2 not checked. [2022-11-22 02:32:02,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:32:02,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626475378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:02,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:32:02,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 13 [2022-11-22 02:32:02,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795080539] [2022-11-22 02:32:02,651 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:02,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:32:02,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:32:02,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:32:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=94, Unknown=3, NotChecked=66, Total=210 [2022-11-22 02:32:02,652 INFO L87 Difference]: Start difference. First operand 288 states and 331 transitions. Second operand has 15 states, 14 states have (on average 5.785714285714286) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:32:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:07,916 INFO L93 Difference]: Finished difference Result 301 states and 339 transitions. [2022-11-22 02:32:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:32:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.785714285714286) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2022-11-22 02:32:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:07,919 INFO L225 Difference]: With dead ends: 301 [2022-11-22 02:32:07,919 INFO L226 Difference]: Without dead ends: 301 [2022-11-22 02:32:07,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 280 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=191, Invalid=465, Unknown=6, NotChecked=150, Total=812 [2022-11-22 02:32:07,920 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 281 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:07,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 258 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 206 Invalid, 0 Unknown, 300 Unchecked, 0.6s Time] [2022-11-22 02:32:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-22 02:32:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2022-11-22 02:32:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1793893129770991) internal successors, (309), 273 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:32:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 329 transitions. [2022-11-22 02:32:07,928 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 329 transitions. Word has length 51 [2022-11-22 02:32:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:07,929 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 329 transitions. [2022-11-22 02:32:07,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.785714285714286) internal successors, (81), 11 states have internal predecessors, (81), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:32:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 329 transitions. [2022-11-22 02:32:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:32:07,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:07,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:32:07,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:08,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-22 02:32:08,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (56)] Ended with exit code 0 [2022-11-22 02:32:08,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:32:08,542 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:32:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2022-11-22 02:32:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:32:08,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215466557] [2022-11-22 02:32:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:08,543 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 [2022-11-22 02:32:08,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:32:08,544 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:32:08,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (59)] Waiting until timeout for monitored process [2022-11-22 02:32:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:08,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:32:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:09,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:32:09,280 INFO L350 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 [2022-11-22 02:32:12,514 INFO L321 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-11-22 02:32:12,514 INFO L350 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 2 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 46 [2022-11-22 02:32:12,699 INFO L350 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 7 [2022-11-22 02:32:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:32:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:13,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:32:13,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215466557] [2022-11-22 02:32:13,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215466557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:13,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143421494] [2022-11-22 02:32:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:13,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:32:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:32:13,355 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:32:13,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-22 02:32:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:32:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:14,352 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:32:14,353 INFO L350 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 26 treesize of output 43 [2022-11-22 02:32:17,431 INFO L321 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2022-11-22 02:32:17,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 62 [2022-11-22 02:32:17,722 INFO L350 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 7 [2022-11-22 02:32:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:32:17,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:18,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143421494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501452337] [2022-11-22 02:32:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:18,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:18,134 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-22 02:32:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:32:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:18,785 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:32:18,785 INFO L350 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 [2022-11-22 02:32:19,627 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-22 02:32:19,627 INFO L350 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 23 treesize of output 35 [2022-11-22 02:32:19,777 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 02:32:19,777 INFO L350 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 18 treesize of output 32 [2022-11-22 02:32:20,062 INFO L350 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 7 [2022-11-22 02:32:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:32:20,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:32:20,317 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-22 02:32:20,317 INFO L350 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 98 treesize of output 91 [2022-11-22 02:32:23,280 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-22 02:32:23,281 INFO L350 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 3 case distinctions, treesize of input 192 treesize of output 207 [2022-11-22 02:32:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:32:24,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501452337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:32:24,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 02:32:24,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2022-11-22 02:32:24,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268227884] [2022-11-22 02:32:24,617 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 02:32:24,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 02:32:24,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:32:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 02:32:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1499, Unknown=4, NotChecked=0, Total=1722 [2022-11-22 02:32:24,619 INFO L87 Difference]: Start difference. First operand 288 states and 329 transitions. Second operand has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 02:32:41,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:32:52,312 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 53 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:33:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:33:00,052 INFO L93 Difference]: Finished difference Result 331 states and 370 transitions. [2022-11-22 02:33:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:33:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2022-11-22 02:33:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:33:00,054 INFO L225 Difference]: With dead ends: 331 [2022-11-22 02:33:00,054 INFO L226 Difference]: Without dead ends: 331 [2022-11-22 02:33:00,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=702, Invalid=2713, Unknown=7, NotChecked=0, Total=3422 [2022-11-22 02:33:00,056 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 386 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:33:00,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 274 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 02:33:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-22 02:33:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 288. [2022-11-22 02:33:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1717557251908397) internal successors, (307), 273 states have internal predecessors, (307), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:33:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2022-11-22 02:33:00,063 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 52 [2022-11-22 02:33:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:33:00,064 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2022-11-22 02:33:00,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 02:33:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2022-11-22 02:33:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:33:00,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:33:00,065 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:33:00,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (59)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:00,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:00,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-22 02:33:00,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:00,679 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:33:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:33:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2022-11-22 02:33:00,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:33:00,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448447356] [2022-11-22 02:33:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:00,680 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 [2022-11-22 02:33:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:33:00,681 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:33:00,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (62)] Waiting until timeout for monitored process [2022-11-22 02:33:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:33:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:01,059 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_243 (_ BitVec 32))) (= (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_243) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:33:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:33:01,140 INFO L350 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 12 treesize of output 14 [2022-11-22 02:33:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 2 not checked. [2022-11-22 02:33:01,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:01,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:33:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448447356] [2022-11-22 02:33:01,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448447356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:01,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1607031797] [2022-11-22 02:33:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:01,992 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:33:01,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:33:01,993 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:33:02,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-22 02:33:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:02,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:33:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:02,554 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_249 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_249))) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:33:02,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:33:02,632 INFO L350 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 12 treesize of output 14 [2022-11-22 02:33:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 2 not checked. [2022-11-22 02:33:02,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:03,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1607031797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:03,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226898458] [2022-11-22 02:33:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:03,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:33:03,245 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:33:03,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-22 02:33:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:03,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:33:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:03,539 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_255 (_ BitVec 32))) (= (store |c_old(#length)| |parse_input_c1_~x~0#1.base| v_ArrVal_255) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:33:03,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:33:03,620 INFO L350 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 12 treesize of output 14 [2022-11-22 02:33:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 2 not checked. [2022-11-22 02:33:03,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:04,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226898458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:04,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:33:04,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-22 02:33:04,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558653785] [2022-11-22 02:33:04,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:33:04,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:33:04,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:33:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:33:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=118, Unknown=3, NotChecked=72, Total=240 [2022-11-22 02:33:04,237 INFO L87 Difference]: Start difference. First operand 288 states and 327 transitions. Second operand has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:33:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:33:05,270 INFO L93 Difference]: Finished difference Result 301 states and 332 transitions. [2022-11-22 02:33:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:33:05,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-11-22 02:33:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:33:05,273 INFO L225 Difference]: With dead ends: 301 [2022-11-22 02:33:05,273 INFO L226 Difference]: Without dead ends: 301 [2022-11-22 02:33:05,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=384, Unknown=3, NotChecked=138, Total=702 [2022-11-22 02:33:05,274 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 208 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:33:05,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 145 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 116 Invalid, 0 Unknown, 249 Unchecked, 0.4s Time] [2022-11-22 02:33:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-22 02:33:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 287. [2022-11-22 02:33:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1412213740458015) internal successors, (299), 272 states have internal predecessors, (299), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:33:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 319 transitions. [2022-11-22 02:33:05,282 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 319 transitions. Word has length 52 [2022-11-22 02:33:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:33:05,283 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 319 transitions. [2022-11-22 02:33:05,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:33:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 319 transitions. [2022-11-22 02:33:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 02:33:05,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:33:05,285 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:33:05,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (62)] Ended with exit code 0 [2022-11-22 02:33:05,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:05,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-22 02:33:05,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:33:05,888 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:33:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:33:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2022-11-22 02:33:05,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:33:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240108480] [2022-11-22 02:33:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:05,889 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 [2022-11-22 02:33:05,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:33:05,891 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:33:05,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (65)] Waiting until timeout for monitored process [2022-11-22 02:33:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:33:06,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:06,317 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:33:06,318 INFO L350 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 [2022-11-22 02:33:06,668 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_266 (_ BitVec 1)) (v_ArrVal_265 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_265) |c_old(~global~0.base)| v_ArrVal_266)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-22 02:33:06,799 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:33:06,799 INFO L350 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 5 case distinctions, treesize of input 29 treesize of output 43 [2022-11-22 02:33:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:33:06,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:07,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:33:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240108480] [2022-11-22 02:33:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240108480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261820814] [2022-11-22 02:33:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:07,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:33:07,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:33:07,278 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:33:07,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-22 02:33:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:33:07,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:08,327 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:33:08,328 INFO L350 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 26 treesize of output 43 [2022-11-22 02:33:10,696 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_280 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_280))) is different from true [2022-11-22 02:33:10,823 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-22 02:33:10,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 43 [2022-11-22 02:33:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:33:11,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261820814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630848342] [2022-11-22 02:33:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:33:11,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:33:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:33:11,313 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:33:11,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-22 02:33:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:33:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:33:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:33:11,675 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:33:11,675 INFO L350 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 [2022-11-22 02:33:12,026 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_265 (_ BitVec 1)) (v_ArrVal_292 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)) (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_265) |c_old(~global~0.base)| v_ArrVal_292) |c_#valid|))) is different from true [2022-11-22 02:33:12,150 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-22 02:33:12,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-22 02:33:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:33:12,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:33:17,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630848342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:33:17,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:33:17,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-22 02:33:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544042162] [2022-11-22 02:33:17,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:33:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:33:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:33:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:33:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=470, Unknown=5, NotChecked=138, Total=702 [2022-11-22 02:33:17,508 INFO L87 Difference]: Start difference. First operand 287 states and 319 transitions. Second operand has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:34:11,708 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_280 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_280))) (exists ((v_ArrVal_266 (_ BitVec 1)) (v_ArrVal_265 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_265) |c_old(~global~0.base)| v_ArrVal_266)) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((v_ArrVal_265 (_ BitVec 1)) (v_ArrVal_292 (_ BitVec 1)) (|parse_input_c1_~x~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)) (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_265) |c_old(~global~0.base)| v_ArrVal_292) |c_#valid|)))) is different from true [2022-11-22 02:34:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:22,376 INFO L93 Difference]: Finished difference Result 320 states and 347 transitions. [2022-11-22 02:34:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 02:34:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-11-22 02:34:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:22,378 INFO L225 Difference]: With dead ends: 320 [2022-11-22 02:34:22,378 INFO L226 Difference]: Without dead ends: 320 [2022-11-22 02:34:22,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 71.4s TimeCoverageRelationStatistics Valid=505, Invalid=1733, Unknown=34, NotChecked=380, Total=2652 [2022-11-22 02:34:22,380 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 460 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:22,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 409 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 554 Invalid, 1 Unknown, 400 Unchecked, 1.8s Time] [2022-11-22 02:34:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-22 02:34:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 293. [2022-11-22 02:34:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 270 states have (on average 1.1333333333333333) internal successors, (306), 278 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-22 02:34:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 324 transitions. [2022-11-22 02:34:22,387 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 324 transitions. Word has length 54 [2022-11-22 02:34:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:22,388 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 324 transitions. [2022-11-22 02:34:22,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:34:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 324 transitions. [2022-11-22 02:34:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:34:22,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:22,389 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:22,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:22,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (65)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:22,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:22,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:22,994 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:34:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2022-11-22 02:34:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:34:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986598262] [2022-11-22 02:34:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:22,995 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 [2022-11-22 02:34:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:34:22,996 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:34:23,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (68)] Waiting until timeout for monitored process [2022-11-22 02:34:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:23,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:34:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:23,839 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:34:23,839 INFO L350 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 [2022-11-22 02:34:26,869 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:34:26,870 INFO L350 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 5 case distinctions, treesize of input 29 treesize of output 43 [2022-11-22 02:34:27,242 INFO L350 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 7 [2022-11-22 02:34:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:27,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:27,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:34:27,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986598262] [2022-11-22 02:34:27,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986598262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:27,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [624499050] [2022-11-22 02:34:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:27,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:34:27,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:34:28,000 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:34:28,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-22 02:34:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:34:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:33,215 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:34:33,216 INFO L350 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 26 treesize of output 43 [2022-11-22 02:34:40,385 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-22 02:34:40,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 43 [2022-11-22 02:34:40,936 INFO L350 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 7 [2022-11-22 02:34:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:41,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:41,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [624499050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:41,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277689420] [2022-11-22 02:34:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:41,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:41,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:41,484 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-22 02:34:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:34:41,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:44,141 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:34:44,142 INFO L350 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 [2022-11-22 02:34:47,160 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-22 02:34:47,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-22 02:34:47,409 INFO L350 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 7 [2022-11-22 02:34:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:47,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:34:51,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277689420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:51,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:34:51,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-22 02:34:51,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081146498] [2022-11-22 02:34:51,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:34:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:34:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:34:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:34:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=737, Unknown=16, NotChecked=0, Total=870 [2022-11-22 02:34:51,646 INFO L87 Difference]: Start difference. First operand 293 states and 324 transitions. Second operand has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:35:35,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:35:39,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:35:41,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:35:43,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:03,312 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 56 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:36:05,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:07,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:09,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:09,864 INFO L93 Difference]: Finished difference Result 354 states and 382 transitions. [2022-11-22 02:36:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 02:36:09,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-11-22 02:36:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:09,867 INFO L225 Difference]: With dead ends: 354 [2022-11-22 02:36:09,867 INFO L226 Difference]: Without dead ends: 354 [2022-11-22 02:36:09,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=595, Invalid=2444, Unknown=41, NotChecked=0, Total=3080 [2022-11-22 02:36:09,869 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 485 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 83 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:09,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 416 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 890 Invalid, 33 Unknown, 0 Unchecked, 17.2s Time] [2022-11-22 02:36:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-22 02:36:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 292. [2022-11-22 02:36:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 270 states have (on average 1.125925925925926) internal successors, (304), 277 states have internal predecessors, (304), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-22 02:36:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 322 transitions. [2022-11-22 02:36:09,874 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 322 transitions. Word has length 60 [2022-11-22 02:36:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:09,874 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 322 transitions. [2022-11-22 02:36:09,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-22 02:36:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 322 transitions. [2022-11-22 02:36:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:36:09,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:09,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:36:09,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-22 02:36:10,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (68)] Ended with exit code 0 [2022-11-22 02:36:10,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2022-11-22 02:36:10,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:36:10,484 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-22 02:36:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:10,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2022-11-22 02:36:10,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:36:10,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672057275] [2022-11-22 02:36:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:10,485 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 [2022-11-22 02:36:10,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:36:10,486 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:36:10,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/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 (71)] Waiting until timeout for monitored process [2022-11-22 02:36:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:36:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:11,383 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:36:11,384 INFO L350 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 12 treesize of output 18 [2022-11-22 02:36:12,150 INFO L350 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 [2022-11-22 02:36:12,417 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:36:12,418 INFO L350 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 16 treesize of output 22 [2022-11-22 02:36:13,848 INFO L350 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 7 [2022-11-22 02:36:13,854 INFO L350 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 7 [2022-11-22 02:36:14,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:14,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 69 [2022-11-22 02:36:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:36:14,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:15,133 INFO L350 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 24 treesize of output 16 [2022-11-22 02:36:15,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:36:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672057275] [2022-11-22 02:36:15,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672057275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:36:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850505271] [2022-11-22 02:36:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:15,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:36:15,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:36:15,287 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:36:15,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-22 02:36:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 02:36:15,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:17,178 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:36:17,178 INFO L350 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 24 [2022-11-22 02:36:17,240 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:36:17,241 INFO L350 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 12 treesize of output 18 [2022-11-22 02:36:22,390 INFO L350 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 [2022-11-22 02:36:22,851 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:36:22,851 INFO L350 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 16 treesize of output 22 [2022-11-22 02:36:22,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:22,882 INFO L350 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 17 treesize of output 23 [2022-11-22 02:36:23,922 INFO L350 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 7 [2022-11-22 02:36:23,931 INFO L350 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 7 [2022-11-22 02:36:24,109 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:36:24,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-22 02:36:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:36:24,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:24,611 INFO L350 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 24 treesize of output 16 [2022-11-22 02:36:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850505271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:36:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007995138] [2022-11-22 02:36:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:24,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:24,801 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:24,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_938b948d-f25e-43b6-b326-81650f6a446b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-22 02:36:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:24,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:36:24,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:25,471 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:36:25,471 INFO L350 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 12 treesize of output 18 [2022-11-22 02:36:26,055 INFO L350 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 [2022-11-22 02:36:26,247 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:36:26,248 INFO L350 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 16 treesize of output 22 [2022-11-22 02:36:27,327 INFO L350 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 7 [2022-11-22 02:36:27,337 INFO L350 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 7 [2022-11-22 02:36:27,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:27,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 69 [2022-11-22 02:36:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:36:27,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:27,803 INFO L350 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 24 treesize of output 16 [2022-11-22 02:36:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007995138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:36:27,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:36:27,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-22 02:36:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182001083] [2022-11-22 02:36:27,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 02:36:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:36:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 02:36:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1019, Unknown=51, NotChecked=0, Total=1190 [2022-11-22 02:36:27,942 INFO L87 Difference]: Start difference. First operand 292 states and 322 transitions. Second operand has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:36:38,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:40,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:42,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:44,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:46,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:48,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:36:55,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]