./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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-38b53e6 [2022-11-25 23:48:37,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:48:37,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:48:37,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:48:37,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:48:37,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:48:37,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:48:37,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:48:37,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:48:37,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:48:37,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:48:37,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:48:37,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:48:37,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:48:37,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:48:37,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:48:37,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:48:37,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:48:37,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:48:37,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:48:37,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:48:37,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:48:37,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:48:37,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:48:37,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:48:37,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:48:37,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:48:37,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:48:37,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:48:37,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:48:37,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:48:37,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:48:37,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:48:37,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:48:37,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:48:37,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:48:37,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:48:37,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:48:37,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:48:37,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:48:37,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:48:37,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:48:38,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:48:38,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:48:38,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:48:38,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:48:38,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:48:38,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:48:38,010 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:48:38,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:48:38,010 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:48:38,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:48:38,012 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:48:38,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:48:38,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:48:38,013 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:48:38,013 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:48:38,013 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:48:38,013 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:48:38,014 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:48:38,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:48:38,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:48:38,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:48:38,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:48:38,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:48:38,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:48:38,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:48:38,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:48:38,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:48:38,017 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:48:38,017 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:48:38,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:48:38,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:48:38,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:48:38,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:48:38,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:48:38,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:48:38,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:48:38,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:48:38,020 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:48:38,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:48:38,020 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:48:38,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:48:38,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:48:38,021 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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-25 23:48:38,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:48:38,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:48:38,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:48:38,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:48:38,371 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:48:38,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-25 23:48:41,621 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:48:42,040 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:48:42,040 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-25 23:48:42,069 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data/081682bf7/f39c363d7de041fc8bf3942fb41789f2/FLAG346f5324d [2022-11-25 23:48:42,097 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data/081682bf7/f39c363d7de041fc8bf3942fb41789f2 [2022-11-25 23:48:42,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:48:42,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:48:42,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:48:42,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:48:42,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:48:42,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13947624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42, skipping insertion in model container [2022-11-25 23:48:42,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:48:42,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:48:42,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:48:42,732 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:48:42,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:48:42,833 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:48:42,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42 WrapperNode [2022-11-25 23:48:42,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:48:42,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:48:42,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:48:42,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:48:42,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,914 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-11-25 23:48:42,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:48:42,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:48:42,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:48:42,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:48:42,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,972 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:48:42,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:48:42,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:48:42,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:48:42,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (1/1) ... [2022-11-25 23:48:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:48:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:43,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:48:43,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:48:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:48:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-25 23:48:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-25 23:48:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:48:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:48:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:48:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:48:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:48:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:48:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:48:43,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:48:43,227 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:48:43,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:48:43,481 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:48:43,512 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:48:43,513 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:48:43,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:48:43 BoogieIcfgContainer [2022-11-25 23:48:43,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:48:43,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:48:43,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:48:43,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:48:43,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:48:42" (1/3) ... [2022-11-25 23:48:43,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169ebd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:48:43, skipping insertion in model container [2022-11-25 23:48:43,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:48:42" (2/3) ... [2022-11-25 23:48:43,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169ebd48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:48:43, skipping insertion in model container [2022-11-25 23:48:43,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:48:43" (3/3) ... [2022-11-25 23:48:43,525 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-25 23:48:43,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:48:43,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-25 23:48:43,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:48:43,602 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;@5bcc53ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:48:43,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-25 23:48:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 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) [2022-11-25 23:48:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:48:43,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:43,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:48:43,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-11-25 23:48:43,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54892744] [2022-11-25 23:48:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:44,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54892744] [2022-11-25 23:48:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54892744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:44,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:44,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202695625] [2022-11-25 23:48:44,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:48:44,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:48:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:48:44,318 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 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) [2022-11-25 23:48:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:44,532 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-11-25 23:48:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:48:44,535 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 [2022-11-25 23:48:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:44,551 INFO L225 Difference]: With dead ends: 118 [2022-11-25 23:48:44,552 INFO L226 Difference]: Without dead ends: 115 [2022-11-25 23:48:44,553 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 [2022-11-25 23:48:44,556 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:44,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:44,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-25 23:48:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-11-25 23:48:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 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) [2022-11-25 23:48:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-25 23:48:44,660 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2022-11-25 23:48:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:44,661 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-25 23:48:44,661 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) [2022-11-25 23:48:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-25 23:48:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:48:44,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:44,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:48:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:48:44,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-11-25 23:48:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814495526] [2022-11-25 23:48:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:44,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814495526] [2022-11-25 23:48:44,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814495526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:44,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:44,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:48:44,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257810758] [2022-11-25 23:48:44,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:44,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:44,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:44,894 INFO L87 Difference]: Start difference. First operand 89 states and 120 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) [2022-11-25 23:48:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:45,078 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-11-25 23:48:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:48:45,079 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 [2022-11-25 23:48:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:45,081 INFO L225 Difference]: With dead ends: 214 [2022-11-25 23:48:45,082 INFO L226 Difference]: Without dead ends: 214 [2022-11-25 23:48:45,082 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 [2022-11-25 23:48:45,084 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:45,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 197 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-25 23:48:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2022-11-25 23:48:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.6484375) internal successors, (211), 145 states have internal predecessors, (211), 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) [2022-11-25 23:48:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2022-11-25 23:48:45,105 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2022-11-25 23:48:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2022-11-25 23:48:45,106 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) [2022-11-25 23:48:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2022-11-25 23:48:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:48:45,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:45,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:48:45,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:48:45,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-11-25 23:48:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461422237] [2022-11-25 23:48:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:45,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461422237] [2022-11-25 23:48:45,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461422237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:45,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:45,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:48:45,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301594731] [2022-11-25 23:48:45,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:45,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:45,490 INFO L87 Difference]: Start difference. First operand 163 states and 256 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) [2022-11-25 23:48:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:45,797 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2022-11-25 23:48:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:45,798 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 [2022-11-25 23:48:45,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:45,801 INFO L225 Difference]: With dead ends: 237 [2022-11-25 23:48:45,801 INFO L226 Difference]: Without dead ends: 237 [2022-11-25 23:48:45,802 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 [2022-11-25 23:48:45,803 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 132 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:45,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 154 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:48:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-25 23:48:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2022-11-25 23:48:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.633587786259542) internal successors, (214), 148 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) [2022-11-25 23:48:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2022-11-25 23:48:45,845 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2022-11-25 23:48:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:45,846 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2022-11-25 23:48:45,846 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) [2022-11-25 23:48:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2022-11-25 23:48:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:48:45,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:45,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:45,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:48:45,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-11-25 23:48:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:45,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99016094] [2022-11-25 23:48:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:45,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:46,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:46,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99016094] [2022-11-25 23:48:46,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99016094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:46,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:46,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:48:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241028710] [2022-11-25 23:48:46,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:46,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:46,089 INFO L87 Difference]: Start difference. First operand 166 states and 259 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) [2022-11-25 23:48:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:46,271 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2022-11-25 23:48:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:46,272 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 [2022-11-25 23:48:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:46,279 INFO L225 Difference]: With dead ends: 216 [2022-11-25 23:48:46,279 INFO L226 Difference]: Without dead ends: 216 [2022-11-25 23:48:46,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:48:46,286 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 117 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:46,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-25 23:48:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2022-11-25 23:48:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.618320610687023) internal successors, (212), 148 states have internal predecessors, (212), 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) [2022-11-25 23:48:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2022-11-25 23:48:46,327 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2022-11-25 23:48:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:46,328 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2022-11-25 23:48:46,332 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) [2022-11-25 23:48:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2022-11-25 23:48:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:48:46,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:46,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:48:46,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-11-25 23:48:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792187089] [2022-11-25 23:48:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:46,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792187089] [2022-11-25 23:48:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792187089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:46,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:46,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:48:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504523210] [2022-11-25 23:48:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:46,441 INFO L87 Difference]: Start difference. First operand 166 states and 257 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) [2022-11-25 23:48:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:46,577 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-11-25 23:48:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:46,578 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 [2022-11-25 23:48:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:46,583 INFO L225 Difference]: With dead ends: 244 [2022-11-25 23:48:46,584 INFO L226 Difference]: Without dead ends: 244 [2022-11-25 23:48:46,584 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 [2022-11-25 23:48:46,589 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:46,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-25 23:48:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-11-25 23:48:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 182 states have internal predecessors, (261), 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) [2022-11-25 23:48:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2022-11-25 23:48:46,613 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2022-11-25 23:48:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:46,613 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2022-11-25 23:48:46,613 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) [2022-11-25 23:48:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2022-11-25 23:48:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:48:46,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:46,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:46,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:48:46,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-11-25 23:48:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:46,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991146627] [2022-11-25 23:48:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:46,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991146627] [2022-11-25 23:48:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991146627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:46,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:46,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:48:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678638909] [2022-11-25 23:48:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:46,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:48:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:48:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:46,711 INFO L87 Difference]: Start difference. First operand 201 states and 306 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) [2022-11-25 23:48:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:46,823 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2022-11-25 23:48:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:48:46,824 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 [2022-11-25 23:48:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:46,825 INFO L225 Difference]: With dead ends: 239 [2022-11-25 23:48:46,826 INFO L226 Difference]: Without dead ends: 239 [2022-11-25 23:48:46,826 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 [2022-11-25 23:48:46,827 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 182 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 [2022-11-25 23:48:46,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-25 23:48:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2022-11-25 23:48:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.583815028901734) internal successors, (274), 192 states have internal predecessors, (274), 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) [2022-11-25 23:48:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2022-11-25 23:48:46,842 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2022-11-25 23:48:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:46,842 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2022-11-25 23:48:46,842 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) [2022-11-25 23:48:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2022-11-25 23:48:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:48:46,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:46,843 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:46,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:48:46,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-11-25 23:48:46,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:46,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992442285] [2022-11-25 23:48:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:47,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992442285] [2022-11-25 23:48:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992442285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754303753] [2022-11-25 23:48:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:47,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:47,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:48:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:48:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:47,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:47,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754303753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952601178] [2022-11-25 23:48:47,671 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:48:47,671 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:47,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:47,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:47,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:47,794 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-25 23:48:50,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:48:54,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2449#(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 [2022-11-25 23:48:54,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:48:54,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:54,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-25 23:48:54,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169629753] [2022-11-25 23:48:54,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:54,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:48:54,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:48:54,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:48:54,023 INFO L87 Difference]: Start difference. First operand 211 states and 319 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) [2022-11-25 23:48:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:54,376 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2022-11-25 23:48:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:48:54,377 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 [2022-11-25 23:48:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:54,379 INFO L225 Difference]: With dead ends: 293 [2022-11-25 23:48:54,379 INFO L226 Difference]: Without dead ends: 293 [2022-11-25 23:48:54,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:48:54,380 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 390 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:54,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 381 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:48:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-25 23:48:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2022-11-25 23:48:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.5054945054945055) internal successors, (274), 204 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-11-25 23:48:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2022-11-25 23:48:54,403 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2022-11-25 23:48:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:54,404 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2022-11-25 23:48:54,404 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) [2022-11-25 23:48:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2022-11-25 23:48:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:48:54,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:54,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:54,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:54,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:48:54,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:48:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-11-25 23:48:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:54,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195034108] [2022-11-25 23:48:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:54,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:54,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:54,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195034108] [2022-11-25 23:48:54,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195034108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:54,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376630304] [2022-11-25 23:48:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:54,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:54,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:54,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:54,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:48:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:54,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:48:54,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:55,084 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 [2022-11-25 23:48:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:55,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:55,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376630304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:55,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164242852] [2022-11-25 23:48:55,177 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:48:55,177 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:48:55,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:48:55,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:48:55,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:48:55,224 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-25 23:48:57,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:49:01,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [164242852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:01,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:49:01,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 18 [2022-11-25 23:49:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522343146] [2022-11-25 23:49:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:49:01,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:49:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:49:01,866 INFO L87 Difference]: Start difference. First operand 223 states and 329 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) [2022-11-25 23:49:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:03,031 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2022-11-25 23:49:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:49:03,032 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 [2022-11-25 23:49:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:03,033 INFO L225 Difference]: With dead ends: 211 [2022-11-25 23:49:03,033 INFO L226 Difference]: Without dead ends: 211 [2022-11-25 23:49:03,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:49:03,034 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:03,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 129 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:49:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-25 23:49:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-25 23:49:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.485207100591716) internal successors, (251), 192 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-25 23:49:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2022-11-25 23:49:03,043 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2022-11-25 23:49:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:03,043 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2022-11-25 23:49:03,043 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) [2022-11-25 23:49:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2022-11-25 23:49:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:49:03,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:03,045 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] [2022-11-25 23:49:03,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:03,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:03,257 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:49:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2022-11-25 23:49:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:03,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382469221] [2022-11-25 23:49:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:03,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:03,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:03,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382469221] [2022-11-25 23:49:03,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382469221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:03,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:49:03,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:49:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005802881] [2022-11-25 23:49:03,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:49:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:49:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:49:03,304 INFO L87 Difference]: Start difference. First operand 205 states and 284 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) [2022-11-25 23:49:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:03,321 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2022-11-25 23:49:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:49:03,321 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 [2022-11-25 23:49:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:03,325 INFO L225 Difference]: With dead ends: 211 [2022-11-25 23:49:03,325 INFO L226 Difference]: Without dead ends: 211 [2022-11-25 23:49:03,326 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 [2022-11-25 23:49:03,328 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 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 [2022-11-25 23:49:03,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:49:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-25 23:49:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-25 23:49:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.467455621301775) internal successors, (248), 192 states have internal predecessors, (248), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-25 23:49:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2022-11-25 23:49:03,340 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2022-11-25 23:49:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:03,340 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2022-11-25 23:49:03,341 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) [2022-11-25 23:49:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2022-11-25 23:49:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:49:03,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:03,342 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] [2022-11-25 23:49:03,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:49:03,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:49:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2022-11-25 23:49:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:03,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596739454] [2022-11-25 23:49:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:03,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596739454] [2022-11-25 23:49:03,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596739454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:03,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82944938] [2022-11-25 23:49:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:03,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:03,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:03,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:49:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:49:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:49:04,124 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 [2022-11-25 23:49:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:04,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:04,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82944938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653363084] [2022-11-25 23:49:04,386 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:49:04,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:49:04,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:49:04,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:49:04,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:49:04,542 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:49:04,543 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 [2022-11-25 23:49:04,826 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:49:04,827 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 [2022-11-25 23:49:05,290 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-25 23:49:06,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:49:20,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4017#(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) (= |parse_input_#in~input#1.base| |parse_input_~input#1.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|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0))' at error location [2022-11-25 23:49:20,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:49:20,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:49:20,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2022-11-25 23:49:20,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469905561] [2022-11-25 23:49:20,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:49:20,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:49:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:49:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=937, Unknown=1, NotChecked=0, Total=1190 [2022-11-25 23:49:20,778 INFO L87 Difference]: Start difference. First operand 205 states and 281 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) [2022-11-25 23:49:21,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:21,660 INFO L93 Difference]: Finished difference Result 320 states and 431 transitions. [2022-11-25 23:49:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:49:21,661 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 [2022-11-25 23:49:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:21,663 INFO L225 Difference]: With dead ends: 320 [2022-11-25 23:49:21,663 INFO L226 Difference]: Without dead ends: 320 [2022-11-25 23:49:21,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=407, Invalid=1662, Unknown=1, NotChecked=0, Total=2070 [2022-11-25 23:49:21,664 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 699 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 115 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:21,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 173 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:49:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-25 23:49:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 220. [2022-11-25 23:49:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 184 states have (on average 1.4728260869565217) internal successors, (271), 207 states have internal predecessors, (271), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-25 23:49:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 304 transitions. [2022-11-25 23:49:21,675 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 304 transitions. Word has length 25 [2022-11-25 23:49:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:21,675 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 304 transitions. [2022-11-25 23:49:21,675 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) [2022-11-25 23:49:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 304 transitions. [2022-11-25 23:49:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:49:21,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:21,677 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] [2022-11-25 23:49:21,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:21,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:21,883 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:49:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1123038032, now seen corresponding path program 1 times [2022-11-25 23:49:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:21,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591055501] [2022-11-25 23:49:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:22,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591055501] [2022-11-25 23:49:22,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591055501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:22,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223284592] [2022-11-25 23:49:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:22,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:22,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:49:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:49:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:22,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:49:22,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223284592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:49:22,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:49:22,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-25 23:49:22,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854001460] [2022-11-25 23:49:22,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:49:22,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:49:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:49:22,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:49:22,218 INFO L87 Difference]: Start difference. First operand 220 states and 304 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) [2022-11-25 23:49:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:22,301 INFO L93 Difference]: Finished difference Result 266 states and 357 transitions. [2022-11-25 23:49:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:49:22,302 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 [2022-11-25 23:49:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:22,304 INFO L225 Difference]: With dead ends: 266 [2022-11-25 23:49:22,304 INFO L226 Difference]: Without dead ends: 266 [2022-11-25 23:49:22,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:49:22,305 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 141 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 [2022-11-25 23:49:22,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 141 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:49:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-25 23:49:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 224. [2022-11-25 23:49:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 188 states have (on average 1.4627659574468086) internal successors, (275), 211 states have internal predecessors, (275), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-25 23:49:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-11-25 23:49:22,318 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 26 [2022-11-25 23:49:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:22,318 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-11-25 23:49:22,318 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) [2022-11-25 23:49:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-11-25 23:49:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:49:22,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:22,320 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] [2022-11-25 23:49:22,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:22,527 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:49:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1361832013, now seen corresponding path program 1 times [2022-11-25 23:49:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:22,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572236899] [2022-11-25 23:49:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:23,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:23,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572236899] [2022-11-25 23:49:23,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572236899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:23,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374748424] [2022-11-25 23:49:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:23,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:23,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:23,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:49:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:49:23,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:49:23,522 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 [2022-11-25 23:49:23,639 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 [2022-11-25 23:49:23,643 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 [2022-11-25 23:49:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:23,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:23,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374748424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432159877] [2022-11-25 23:49:23,888 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:49:23,888 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:49:23,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:49:23,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:49:23,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:49:24,065 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:49:24,065 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 [2022-11-25 23:49:24,373 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:49:24,373 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 [2022-11-25 23:49:24,724 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-25 23:49:25,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:49:39,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5293#(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 [2022-11-25 23:49:39,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:49:39,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:49:39,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-25 23:49:39,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281544807] [2022-11-25 23:49:39,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:49:39,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:49:39,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:49:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1168, Unknown=1, NotChecked=0, Total=1482 [2022-11-25 23:49:39,400 INFO L87 Difference]: Start difference. First operand 224 states and 308 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) [2022-11-25 23:49:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:40,322 INFO L93 Difference]: Finished difference Result 264 states and 353 transitions. [2022-11-25 23:49:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:49:40,323 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 [2022-11-25 23:49:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:40,324 INFO L225 Difference]: With dead ends: 264 [2022-11-25 23:49:40,325 INFO L226 Difference]: Without dead ends: 264 [2022-11-25 23:49:40,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=474, Invalid=1973, Unknown=3, NotChecked=0, Total=2450 [2022-11-25 23:49:40,326 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 522 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 106 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:40,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 245 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 274 Invalid, 5 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:49:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-25 23:49:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2022-11-25 23:49:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 188 states have (on average 1.452127659574468) internal successors, (273), 211 states have internal predecessors, (273), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-25 23:49:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2022-11-25 23:49:40,338 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 27 [2022-11-25 23:49:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:40,338 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2022-11-25 23:49:40,338 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) [2022-11-25 23:49:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2022-11-25 23:49:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:49:40,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:40,340 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] [2022-11-25 23:49:40,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 23:49:40,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:40,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:49:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash -732880510, now seen corresponding path program 1 times [2022-11-25 23:49:40,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:40,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412112669] [2022-11-25 23:49:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:40,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:40,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:40,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412112669] [2022-11-25 23:49:40,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412112669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:40,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81699447] [2022-11-25 23:49:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:40,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:40,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:40,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:40,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:49:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:49:40,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:40,999 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:49:41,000 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 [2022-11-25 23:49:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:41,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:41,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81699447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577217494] [2022-11-25 23:49:41,106 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:49:41,106 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:49:41,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:49:41,107 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:49:41,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:49:41,243 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:49:41,243 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 [2022-11-25 23:49:41,511 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:49:41,511 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 [2022-11-25 23:49:41,788 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-25 23:49:42,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:49:55,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5940#(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 [2022-11-25 23:49:55,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:49:55,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:49:55,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-25 23:49:55,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37083133] [2022-11-25 23:49:55,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:49:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:49:55,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:49:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:49:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:49:55,966 INFO L87 Difference]: Start difference. First operand 224 states and 306 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) [2022-11-25 23:49:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:56,469 INFO L93 Difference]: Finished difference Result 336 states and 428 transitions. [2022-11-25 23:49:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:49:56,470 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 [2022-11-25 23:49:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:56,472 INFO L225 Difference]: With dead ends: 336 [2022-11-25 23:49:56,472 INFO L226 Difference]: Without dead ends: 336 [2022-11-25 23:49:56,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:49:56,473 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 417 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:56,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 341 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:49:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-25 23:49:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 289. [2022-11-25 23:49:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 250 states have (on average 1.428) internal successors, (357), 274 states have internal predecessors, (357), 7 states have call successors, (7), 7 states have call predecessors, (7), 14 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-11-25 23:49:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 390 transitions. [2022-11-25 23:49:56,482 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 390 transitions. Word has length 28 [2022-11-25 23:49:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:56,482 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 390 transitions. [2022-11-25 23:49:56,483 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) [2022-11-25 23:49:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 390 transitions. [2022-11-25 23:49:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:49:56,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:56,484 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] [2022-11-25 23:49:56,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:49:56,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:49:56,688 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:49:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1244459281, now seen corresponding path program 1 times [2022-11-25 23:49:56,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:49:56,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214030673] [2022-11-25 23:49:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:56,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:49:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:56,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:49:56,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214030673] [2022-11-25 23:49:56,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214030673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:56,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38304710] [2022-11-25 23:49:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:49:56,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:56,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:56,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:56,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:49:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:49:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:49:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:49:57,158 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 [2022-11-25 23:49:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:49:57,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:57,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38304710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:49:57,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259029224] [2022-11-25 23:49:57,387 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:49:57,387 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:49:57,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:49:57,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:49:57,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:49:57,517 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:49:57,518 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 [2022-11-25 23:49:57,757 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:49:57,757 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 [2022-11-25 23:49:58,054 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-25 23:49:58,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:12,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6729#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= ~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 [2022-11-25 23:50:12,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:12,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:50:12,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-25 23:50:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201379158] [2022-11-25 23:50:12,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:12,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:50:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:50:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:50:12,235 INFO L87 Difference]: Start difference. First operand 289 states and 390 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) [2022-11-25 23:50:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:12,962 INFO L93 Difference]: Finished difference Result 364 states and 452 transitions. [2022-11-25 23:50:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:50:12,963 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 [2022-11-25 23:50:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:12,965 INFO L225 Difference]: With dead ends: 364 [2022-11-25 23:50:12,965 INFO L226 Difference]: Without dead ends: 364 [2022-11-25 23:50:12,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:50:12,966 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 589 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:12,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 343 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:50:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-25 23:50:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 315. [2022-11-25 23:50:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 274 states have (on average 1.4416058394160585) internal successors, (395), 300 states have internal predecessors, (395), 7 states have call successors, (7), 7 states have call predecessors, (7), 16 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-25 23:50:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 424 transitions. [2022-11-25 23:50:12,977 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 424 transitions. Word has length 29 [2022-11-25 23:50:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:12,978 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 424 transitions. [2022-11-25 23:50:12,978 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) [2022-11-25 23:50:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 424 transitions. [2022-11-25 23:50:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 23:50:12,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:12,979 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] [2022-11-25 23:50:12,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:50:13,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:50:13,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1727568309, now seen corresponding path program 1 times [2022-11-25 23:50:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:13,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751207328] [2022-11-25 23:50:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:13,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:13,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751207328] [2022-11-25 23:50:13,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751207328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156536919] [2022-11-25 23:50:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:13,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:13,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:13,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:50:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:50:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:13,827 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 [2022-11-25 23:50:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:13,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:18,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156536919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:18,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955601852] [2022-11-25 23:50:18,211 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:50:18,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:18,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:18,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:18,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:18,480 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-25 23:50:18,480 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 [2022-11-25 23:50:18,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:18,569 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-25 23:50:18,569 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 [2022-11-25 23:50:19,109 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-25 23:50:19,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:19,345 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:50:19,346 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 [2022-11-25 23:50:19,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:19,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:19,400 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-25 23:50:19,400 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 [2022-11-25 23:50:19,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:23,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7604#(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 [2022-11-25 23:50:23,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:23,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:50:23,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-25 23:50:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460404519] [2022-11-25 23:50:23,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:23,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:50:23,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:50:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1312, Unknown=5, NotChecked=0, Total=1482 [2022-11-25 23:50:23,416 INFO L87 Difference]: Start difference. First operand 315 states and 424 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) [2022-11-25 23:50:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:24,452 INFO L93 Difference]: Finished difference Result 402 states and 519 transitions. [2022-11-25 23:50:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:50:24,453 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 [2022-11-25 23:50:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:24,455 INFO L225 Difference]: With dead ends: 402 [2022-11-25 23:50:24,455 INFO L226 Difference]: Without dead ends: 402 [2022-11-25 23:50:24,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=348, Invalid=2197, Unknown=5, NotChecked=0, Total=2550 [2022-11-25 23:50:24,457 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 572 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 68 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:24,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 258 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 433 Invalid, 4 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:50:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-25 23:50:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 193. [2022-11-25 23:50:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 168 states have (on average 1.3869047619047619) internal successors, (233), 184 states have internal predecessors, (233), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-25 23:50:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 244 transitions. [2022-11-25 23:50:24,467 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 244 transitions. Word has length 33 [2022-11-25 23:50:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:24,468 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 244 transitions. [2022-11-25 23:50:24,468 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) [2022-11-25 23:50:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 244 transitions. [2022-11-25 23:50:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 23:50:24,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:24,469 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] [2022-11-25 23:50:24,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:24,686 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2015009977, now seen corresponding path program 1 times [2022-11-25 23:50:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:24,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599886105] [2022-11-25 23:50:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:25,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599886105] [2022-11-25 23:50:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599886105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436736167] [2022-11-25 23:50:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:25,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:25,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:25,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:50:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:25,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:50:25,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:25,441 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:50:25,441 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 [2022-11-25 23:50:25,609 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 [2022-11-25 23:50:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:25,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:25,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436736167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:25,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459351772] [2022-11-25 23:50:25,758 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:50:25,759 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:25,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:25,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:25,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:25,993 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-25 23:50:25,994 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 [2022-11-25 23:50:26,104 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-25 23:50:26,105 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 [2022-11-25 23:50:26,675 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-25 23:50:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:27,128 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:50:27,128 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 [2022-11-25 23:50:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:27,188 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:50:27,188 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 [2022-11-25 23:50:27,377 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:31,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8402#(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 [2022-11-25 23:50:31,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:31,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:50:31,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-25 23:50:31,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477172126] [2022-11-25 23:50:31,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:31,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:50:31,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:50:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1233, Unknown=1, NotChecked=0, Total=1406 [2022-11-25 23:50:31,072 INFO L87 Difference]: Start difference. First operand 193 states and 244 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) [2022-11-25 23:50:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:31,826 INFO L93 Difference]: Finished difference Result 269 states and 315 transitions. [2022-11-25 23:50:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:50:31,827 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 [2022-11-25 23:50:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:31,828 INFO L225 Difference]: With dead ends: 269 [2022-11-25 23:50:31,828 INFO L226 Difference]: Without dead ends: 269 [2022-11-25 23:50:31,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=302, Invalid=1953, Unknown=1, NotChecked=0, Total=2256 [2022-11-25 23:50:31,830 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 439 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:31,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 388 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 391 Invalid, 2 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:50:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-25 23:50:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 193. [2022-11-25 23:50:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 168 states have (on average 1.375) internal successors, (231), 184 states have internal predecessors, (231), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-25 23:50:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 242 transitions. [2022-11-25 23:50:31,839 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 242 transitions. Word has length 34 [2022-11-25 23:50:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:31,839 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 242 transitions. [2022-11-25 23:50:31,840 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) [2022-11-25 23:50:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 242 transitions. [2022-11-25 23:50:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:50:31,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:31,842 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] [2022-11-25 23:50:31,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:32,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:32,049 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1959200108, now seen corresponding path program 1 times [2022-11-25 23:50:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:32,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678645375] [2022-11-25 23:50:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:32,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:32,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678645375] [2022-11-25 23:50:32,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678645375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:32,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198008302] [2022-11-25 23:50:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:32,534 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:32,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:50:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:50:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:33,028 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 [2022-11-25 23:50:33,262 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 [2022-11-25 23:50:33,268 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 [2022-11-25 23:50:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:33,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198008302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610102427] [2022-11-25 23:50:33,629 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:50:33,629 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:33,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:33,629 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:33,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:33,888 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-25 23:50:33,889 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 [2022-11-25 23:50:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:33,978 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-25 23:50:33,979 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 [2022-11-25 23:50:34,443 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-25 23:50:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:34,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:34,796 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:50:34,796 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 [2022-11-25 23:50:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:34,845 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-25 23:50:34,846 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 [2022-11-25 23:50:35,111 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:40,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9072#(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 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.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|))) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:40,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:40,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:50:40,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2022-11-25 23:50:40,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698165388] [2022-11-25 23:50:40,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:40,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:50:40,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:50:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 23:50:40,012 INFO L87 Difference]: Start difference. First operand 193 states and 242 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) [2022-11-25 23:50:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:41,527 INFO L93 Difference]: Finished difference Result 290 states and 337 transitions. [2022-11-25 23:50:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:50:41,528 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 [2022-11-25 23:50:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:41,529 INFO L225 Difference]: With dead ends: 290 [2022-11-25 23:50:41,529 INFO L226 Difference]: Without dead ends: 290 [2022-11-25 23:50:41,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 23:50:41,531 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 525 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:41,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 395 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:50:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-25 23:50:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 194. [2022-11-25 23:50:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 170 states have (on average 1.3529411764705883) internal successors, (230), 185 states have internal predecessors, (230), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-25 23:50:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 241 transitions. [2022-11-25 23:50:41,539 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 241 transitions. Word has length 35 [2022-11-25 23:50:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:41,539 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 241 transitions. [2022-11-25 23:50:41,539 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) [2022-11-25 23:50:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 241 transitions. [2022-11-25 23:50:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:50:41,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:41,540 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] [2022-11-25 23:50:41,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 23:50:41,747 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -724690043, now seen corresponding path program 1 times [2022-11-25 23:50:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170832356] [2022-11-25 23:50:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:41,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170832356] [2022-11-25 23:50:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170832356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387808046] [2022-11-25 23:50:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:41,846 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:41,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:50:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:50:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:41,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:42,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387808046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [32799788] [2022-11-25 23:50:42,044 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:50:42,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:42,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:42,045 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:42,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:42,154 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:50:42,154 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 [2022-11-25 23:50:42,175 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-25 23:50:42,175 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 [2022-11-25 23:50:42,537 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-25 23:50:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:42,731 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-25 23:50:42,732 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 [2022-11-25 23:50:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:43,004 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:50:43,005 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 [2022-11-25 23:50:43,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:48,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [32799788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:50:48,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:48,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-25 23:50:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415031024] [2022-11-25 23:50:48,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:50:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:50:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:50:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:50:48,178 INFO L87 Difference]: Start difference. First operand 194 states and 241 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) [2022-11-25 23:50:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:48,749 INFO L93 Difference]: Finished difference Result 273 states and 331 transitions. [2022-11-25 23:50:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:50:48,750 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 [2022-11-25 23:50:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:48,752 INFO L225 Difference]: With dead ends: 273 [2022-11-25 23:50:48,752 INFO L226 Difference]: Without dead ends: 273 [2022-11-25 23:50:48,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:50:48,752 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:48,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:50:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-25 23:50:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2022-11-25 23:50:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 222 states have (on average 1.3333333333333333) internal successors, (296), 239 states have internal predecessors, (296), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:50:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 313 transitions. [2022-11-25 23:50:48,759 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 313 transitions. Word has length 37 [2022-11-25 23:50:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:48,759 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 313 transitions. [2022-11-25 23:50:48,759 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) [2022-11-25 23:50:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 313 transitions. [2022-11-25 23:50:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 23:50:48,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:48,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:48,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:50:48,973 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1556026682, now seen corresponding path program 1 times [2022-11-25 23:50:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680416874] [2022-11-25 23:50:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:50:49,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680416874] [2022-11-25 23:50:49,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680416874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535462474] [2022-11-25 23:50:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:49,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:49,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:49,092 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:49,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:50:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:50:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:50:49,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:50:49,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535462474] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:49,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:50:49,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-25 23:50:49,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334242528] [2022-11-25 23:50:49,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:50:49,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:50:49,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:50:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:50:49,370 INFO L87 Difference]: Start difference. First operand 250 states and 313 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 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) [2022-11-25 23:50:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:49,411 INFO L93 Difference]: Finished difference Result 393 states and 494 transitions. [2022-11-25 23:50:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:50:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 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 [2022-11-25 23:50:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:49,414 INFO L225 Difference]: With dead ends: 393 [2022-11-25 23:50:49,414 INFO L226 Difference]: Without dead ends: 393 [2022-11-25 23:50:49,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:50:49,414 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 62 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:49,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 122 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:50:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-25 23:50:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 377. [2022-11-25 23:50:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 338 states have (on average 1.331360946745562) internal successors, (450), 360 states have internal predecessors, (450), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-25 23:50:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 485 transitions. [2022-11-25 23:50:49,426 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 485 transitions. Word has length 38 [2022-11-25 23:50:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:49,426 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 485 transitions. [2022-11-25 23:50:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 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) [2022-11-25 23:50:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 485 transitions. [2022-11-25 23:50:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 23:50:49,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:49,428 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] [2022-11-25 23:50:49,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:49,641 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash -990554755, now seen corresponding path program 1 times [2022-11-25 23:50:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:49,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492527825] [2022-11-25 23:50:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:49,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:49,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492527825] [2022-11-25 23:50:49,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492527825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962369682] [2022-11-25 23:50:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:49,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:49,759 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:49,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:50:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:50:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:49,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:50,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962369682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287302956] [2022-11-25 23:50:50,012 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:50:50,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:50,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:50,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:50,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:50,163 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:50:50,164 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 [2022-11-25 23:50:50,190 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-25 23:50:50,190 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 [2022-11-25 23:50:50,600 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-25 23:50:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:50,819 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:50:50,820 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 [2022-11-25 23:50:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:50,867 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-25 23:50:50,868 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 [2022-11-25 23:50:51,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:56,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11594#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< ~global~0.base |#StackHeapBarrier|)) (= 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.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 [2022-11-25 23:50:56,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:56,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:56,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-25 23:50:56,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336927424] [2022-11-25 23:50:56,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:56,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:50:56,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:56,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:50:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:50:56,084 INFO L87 Difference]: Start difference. First operand 377 states and 485 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) [2022-11-25 23:50:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:56,139 INFO L93 Difference]: Finished difference Result 378 states and 482 transitions. [2022-11-25 23:50:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:50:56,139 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 [2022-11-25 23:50:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:56,141 INFO L225 Difference]: With dead ends: 378 [2022-11-25 23:50:56,141 INFO L226 Difference]: Without dead ends: 378 [2022-11-25 23:50:56,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:50:56,142 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:56,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 67 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:50:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-25 23:50:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2022-11-25 23:50:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 338 states have (on average 1.3136094674556213) internal successors, (444), 358 states have internal predecessors, (444), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-25 23:50:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 479 transitions. [2022-11-25 23:50:56,152 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 479 transitions. Word has length 38 [2022-11-25 23:50:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:56,152 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 479 transitions. [2022-11-25 23:50:56,153 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) [2022-11-25 23:50:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 479 transitions. [2022-11-25 23:50:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 23:50:56,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:56,154 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] [2022-11-25 23:50:56,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:56,369 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:50:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -642426233, now seen corresponding path program 1 times [2022-11-25 23:50:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:56,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901381053] [2022-11-25 23:50:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:56,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:56,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901381053] [2022-11-25 23:50:56,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901381053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:56,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794203122] [2022-11-25 23:50:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:56,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:56,520 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:56,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:50:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:50:56,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:56,623 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 [2022-11-25 23:50:56,671 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:50:56,672 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 [2022-11-25 23:50:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:56,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794203122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:56,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662758895] [2022-11-25 23:50:56,872 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:50:56,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:56,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:56,874 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:56,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:57,005 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:50:57,006 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 [2022-11-25 23:50:57,033 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-25 23:50:57,034 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 [2022-11-25 23:50:57,456 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-25 23:50:57,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:57,672 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:50:57,672 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 [2022-11-25 23:50:57,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:57,704 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-25 23:50:57,704 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 [2022-11-25 23:50:57,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:03,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12602#(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 [2022-11-25 23:51:03,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:03,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:03,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-25 23:51:03,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087332606] [2022-11-25 23:51:03,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:03,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:51:03,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:51:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:51:03,778 INFO L87 Difference]: Start difference. First operand 375 states and 479 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) [2022-11-25 23:51:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:03,912 INFO L93 Difference]: Finished difference Result 409 states and 512 transitions. [2022-11-25 23:51:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:51:03,913 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 [2022-11-25 23:51:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:03,915 INFO L225 Difference]: With dead ends: 409 [2022-11-25 23:51:03,915 INFO L226 Difference]: Without dead ends: 409 [2022-11-25 23:51:03,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:51:03,916 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 54 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:03,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 166 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:51:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-25 23:51:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 382. [2022-11-25 23:51:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 345 states have (on average 1.3101449275362318) internal successors, (452), 365 states have internal predecessors, (452), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-25 23:51:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 487 transitions. [2022-11-25 23:51:03,928 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 487 transitions. Word has length 39 [2022-11-25 23:51:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:03,928 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 487 transitions. [2022-11-25 23:51:03,929 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) [2022-11-25 23:51:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 487 transitions. [2022-11-25 23:51:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:51:03,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:03,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:03,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:04,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:04,136 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:04,137 INFO L85 PathProgramCache]: Analyzing trace with hash 693025532, now seen corresponding path program 1 times [2022-11-25 23:51:04,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:04,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336434063] [2022-11-25 23:51:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:51:04,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336434063] [2022-11-25 23:51:04,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336434063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52053594] [2022-11-25 23:51:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:04,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:04,258 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:04,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:51:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:51:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:51:04,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:51:04,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52053594] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:04,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:51:04,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-25 23:51:04,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972726611] [2022-11-25 23:51:04,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:04,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:51:04,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:51:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:51:04,545 INFO L87 Difference]: Start difference. First operand 382 states and 487 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 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) [2022-11-25 23:51:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:04,593 INFO L93 Difference]: Finished difference Result 453 states and 565 transitions. [2022-11-25 23:51:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:51:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 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 [2022-11-25 23:51:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:04,600 INFO L225 Difference]: With dead ends: 453 [2022-11-25 23:51:04,600 INFO L226 Difference]: Without dead ends: 453 [2022-11-25 23:51:04,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:51:04,601 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 73 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:04,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:51:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-25 23:51:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2022-11-25 23:51:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 389 states have (on average 1.3110539845758356) internal successors, (510), 411 states have internal predecessors, (510), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-25 23:51:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 549 transitions. [2022-11-25 23:51:04,613 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 549 transitions. Word has length 40 [2022-11-25 23:51:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:04,614 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 549 transitions. [2022-11-25 23:51:04,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 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) [2022-11-25 23:51:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 549 transitions. [2022-11-25 23:51:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:51:04,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:04,615 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] [2022-11-25 23:51:04,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:04,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:04,825 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:04,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1106991010, now seen corresponding path program 1 times [2022-11-25 23:51:04,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507943453] [2022-11-25 23:51:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:51:04,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507943453] [2022-11-25 23:51:04,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507943453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:04,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:51:04,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:51:04,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820842822] [2022-11-25 23:51:04,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:04,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:51:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:51:04,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:51:04,877 INFO L87 Difference]: Start difference. First operand 430 states and 549 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) [2022-11-25 23:51:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:04,887 INFO L93 Difference]: Finished difference Result 310 states and 372 transitions. [2022-11-25 23:51:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:51:04,888 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 [2022-11-25 23:51:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:04,890 INFO L225 Difference]: With dead ends: 310 [2022-11-25 23:51:04,890 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 23:51:04,890 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 [2022-11-25 23:51:04,891 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 86 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 [2022-11-25 23:51:04,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 86 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:51:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 23:51:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 292. [2022-11-25 23:51:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 266 states have (on average 1.2406015037593985) internal successors, (330), 277 states have internal predecessors, (330), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-25 23:51:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 354 transitions. [2022-11-25 23:51:04,904 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 354 transitions. Word has length 44 [2022-11-25 23:51:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:04,904 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 354 transitions. [2022-11-25 23:51:04,904 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) [2022-11-25 23:51:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 354 transitions. [2022-11-25 23:51:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 23:51:04,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:04,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:04,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 23:51:04,906 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1705702260, now seen corresponding path program 1 times [2022-11-25 23:51:04,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:04,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389901235] [2022-11-25 23:51:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:51:04,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389901235] [2022-11-25 23:51:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389901235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37018076] [2022-11-25 23:51:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:04,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:04,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:05,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:51:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:51:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:51:05,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:05,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37018076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:05,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311752849] [2022-11-25 23:51:05,793 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:51:05,793 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:05,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:05,794 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:05,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:05,988 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-25 23:51:05,988 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 [2022-11-25 23:51:06,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:06,073 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-25 23:51:06,073 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 [2022-11-25 23:51:06,477 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-25 23:51:06,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:06,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:06,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:06,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:06,689 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:51:06,690 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 [2022-11-25 23:51:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:06,751 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:51:06,752 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 [2022-11-25 23:51:06,966 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:10,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [311752849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:51:10,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:10,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 5, 7] total 31 [2022-11-25 23:51:10,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53901404] [2022-11-25 23:51:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:51:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:51:10,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:10,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:51:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:51:10,563 INFO L87 Difference]: Start difference. First operand 292 states and 354 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-11-25 23:51:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:12,787 INFO L93 Difference]: Finished difference Result 312 states and 373 transitions. [2022-11-25 23:51:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:51:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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 45 [2022-11-25 23:51:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:12,789 INFO L225 Difference]: With dead ends: 312 [2022-11-25 23:51:12,789 INFO L226 Difference]: Without dead ends: 312 [2022-11-25 23:51:12,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 23:51:12,791 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:12,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 140 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:51:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-25 23:51:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 250. [2022-11-25 23:51:12,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 227 states have (on average 1.2466960352422907) internal successors, (283), 237 states have internal predecessors, (283), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 301 transitions. [2022-11-25 23:51:12,797 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 301 transitions. Word has length 45 [2022-11-25 23:51:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:12,797 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 301 transitions. [2022-11-25 23:51:12,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-11-25 23:51:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 301 transitions. [2022-11-25 23:51:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:51:12,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:12,798 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] [2022-11-25 23:51:12,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 23:51:13,008 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117614, now seen corresponding path program 1 times [2022-11-25 23:51:13,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:13,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757974085] [2022-11-25 23:51:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:13,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757974085] [2022-11-25 23:51:13,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757974085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155040490] [2022-11-25 23:51:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:13,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:13,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:13,323 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:13,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:51:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:51:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:13,565 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:51:13,566 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 [2022-11-25 23:51:13,704 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:51:13,704 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 [2022-11-25 23:51:13,749 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:51:13,749 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 [2022-11-25 23:51:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:13,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:13,885 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:51:13,886 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 [2022-11-25 23:51:14,144 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:51:14,144 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 110 treesize of output 105 [2022-11-25 23:51:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:14,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155040490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:14,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989045742] [2022-11-25 23:51:14,380 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 23:51:14,380 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:14,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:14,380 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:14,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:14,523 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:51:14,523 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 [2022-11-25 23:51:14,762 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:51:14,762 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 [2022-11-25 23:51:14,948 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-25 23:51:14,948 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 [2022-11-25 23:51:14,966 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:15,068 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:15,489 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-25 23:51:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:15,618 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-25 23:51:15,618 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 [2022-11-25 23:51:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:15,754 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:51:15,754 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 [2022-11-25 23:51:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:15,917 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-25 23:51:15,917 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 [2022-11-25 23:51:15,952 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:16,005 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:16,062 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:16,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:20,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16337#(and (= 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 [2022-11-25 23:51:20,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:20,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:20,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-11-25 23:51:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129772317] [2022-11-25 23:51:20,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:20,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:51:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:51:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 23:51:20,034 INFO L87 Difference]: Start difference. First operand 250 states and 301 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) [2022-11-25 23:51:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:20,335 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2022-11-25 23:51:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:51:20,337 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 [2022-11-25 23:51:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:20,339 INFO L225 Difference]: With dead ends: 255 [2022-11-25 23:51:20,339 INFO L226 Difference]: Without dead ends: 255 [2022-11-25 23:51:20,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 23:51:20,340 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:20,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 114 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:51:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-25 23:51:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2022-11-25 23:51:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2422907488986785) internal successors, (282), 236 states have internal predecessors, (282), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2022-11-25 23:51:20,347 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 48 [2022-11-25 23:51:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:20,348 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2022-11-25 23:51:20,348 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) [2022-11-25 23:51:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2022-11-25 23:51:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:51:20,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:20,349 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] [2022-11-25 23:51:20,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-25 23:51:20,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 23:51:20,555 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash 187710493, now seen corresponding path program 1 times [2022-11-25 23:51:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127187458] [2022-11-25 23:51:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:20,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127187458] [2022-11-25 23:51:20,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127187458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693344496] [2022-11-25 23:51:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:20,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:20,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:20,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:20,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:51:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:51:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:20,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:20,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693344496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:20,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610487190] [2022-11-25 23:51:20,894 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:51:20,894 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:20,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:20,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:20,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:20,994 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:51:20,994 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 [2022-11-25 23:51:21,017 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-25 23:51:21,017 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 [2022-11-25 23:51:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:21,402 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-25 23:51:21,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 723 treesize of output 699 [2022-11-25 23:51:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:21,424 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-25 23:51:21,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 699 treesize of output 675 [2022-11-25 23:51:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:21,710 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-25 23:51:21,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 723 treesize of output 699 [2022-11-25 23:51:21,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:21,735 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-25 23:51:21,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 699 treesize of output 675 [2022-11-25 23:51:22,023 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2022-11-25 23:51:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:22,200 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:51:22,201 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 [2022-11-25 23:51:22,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:22,226 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-25 23:51:22,227 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 [2022-11-25 23:51:22,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:26,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17159#(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|)) (<= 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) (= |#NULL.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:26,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:26,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:26,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-25 23:51:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100487219] [2022-11-25 23:51:26,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:26,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:51:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:51:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:51:26,546 INFO L87 Difference]: Start difference. First operand 249 states and 300 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) [2022-11-25 23:51:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:26,706 INFO L93 Difference]: Finished difference Result 267 states and 312 transitions. [2022-11-25 23:51:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:51:26,706 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 [2022-11-25 23:51:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:26,708 INFO L225 Difference]: With dead ends: 267 [2022-11-25 23:51:26,708 INFO L226 Difference]: Without dead ends: 267 [2022-11-25 23:51:26,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:51:26,709 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:26,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 189 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:51:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-25 23:51:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 249. [2022-11-25 23:51:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2290748898678414) internal successors, (279), 236 states have internal predecessors, (279), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-11-25 23:51:26,719 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 48 [2022-11-25 23:51:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:26,720 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-11-25 23:51:26,720 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) [2022-11-25 23:51:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-11-25 23:51:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:51:26,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:26,721 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] [2022-11-25 23:51:26,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:26,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 23:51:26,927 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1739820872, now seen corresponding path program 1 times [2022-11-25 23:51:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196344707] [2022-11-25 23:51:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:51:27,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196344707] [2022-11-25 23:51:27,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196344707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637134745] [2022-11-25 23:51:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:27,137 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:27,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:51:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:51:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:27,387 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:51:27,387 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 [2022-11-25 23:51:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:51:27,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:27,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637134745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574934649] [2022-11-25 23:51:27,525 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:51:27,525 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:27,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:27,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:27,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:27,772 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-25 23:51:27,772 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 [2022-11-25 23:51:27,867 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-25 23:51:27,867 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 [2022-11-25 23:51:28,188 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-25 23:51:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:28,510 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:51:28,511 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 [2022-11-25 23:51:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:28,567 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:51:28,568 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 [2022-11-25 23:51:28,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:31,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17887#(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 [2022-11-25 23:51:31,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:31,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:51:31,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-11-25 23:51:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688491340] [2022-11-25 23:51:31,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:31,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:51:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:51:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:51:31,921 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:51:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:32,283 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2022-11-25 23:51:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:51:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-25 23:51:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:32,286 INFO L225 Difference]: With dead ends: 261 [2022-11-25 23:51:32,286 INFO L226 Difference]: Without dead ends: 261 [2022-11-25 23:51:32,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:51:32,287 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 192 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:32,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 201 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:51:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-25 23:51:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 249. [2022-11-25 23:51:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2202643171806167) internal successors, (277), 236 states have internal predecessors, (277), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 295 transitions. [2022-11-25 23:51:32,295 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 295 transitions. Word has length 49 [2022-11-25 23:51:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:32,296 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 295 transitions. [2022-11-25 23:51:32,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:51:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 295 transitions. [2022-11-25 23:51:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:51:32,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:32,297 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] [2022-11-25 23:51:32,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 23:51:32,505 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash 276136575, now seen corresponding path program 1 times [2022-11-25 23:51:32,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:32,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80257409] [2022-11-25 23:51:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:33,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80257409] [2022-11-25 23:51:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80257409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326413822] [2022-11-25 23:51:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:33,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:33,472 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:33,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 23:51:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 23:51:33,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:33,822 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:51:33,823 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 [2022-11-25 23:51:34,099 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-25 23:51:34,099 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 [2022-11-25 23:51:34,173 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:51:34,174 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 [2022-11-25 23:51:34,331 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 [2022-11-25 23:51:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:34,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:34,463 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 23:51:34,463 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 [2022-11-25 23:51:34,771 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-25 23:51:34,772 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 84 treesize of output 101 [2022-11-25 23:51:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:35,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326413822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:35,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191786331] [2022-11-25 23:51:35,149 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 23:51:35,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:35,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:35,150 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:35,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:35,262 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:51:35,263 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 [2022-11-25 23:51:35,476 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:51:35,476 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 [2022-11-25 23:51:35,633 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-25 23:51:35,633 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 [2022-11-25 23:51:35,665 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 23:51:35,738 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 23:51:36,074 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-25 23:51:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:36,177 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:51:36,178 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 [2022-11-25 23:51:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:36,200 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-25 23:51:36,200 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 [2022-11-25 23:51:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:36,342 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-25 23:51:36,342 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 [2022-11-25 23:51:36,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:40,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18761#(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 [2022-11-25 23:51:40,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:40,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:40,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2022-11-25 23:51:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851223443] [2022-11-25 23:51:40,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:40,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 23:51:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 23:51:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-11-25 23:51:40,355 INFO L87 Difference]: Start difference. First operand 249 states and 295 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) [2022-11-25 23:51:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:41,785 INFO L93 Difference]: Finished difference Result 310 states and 359 transitions. [2022-11-25 23:51:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:51:41,786 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 [2022-11-25 23:51:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:41,787 INFO L225 Difference]: With dead ends: 310 [2022-11-25 23:51:41,787 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 23:51:41,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=845, Invalid=4705, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 23:51:41,789 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:41,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 246 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:51:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 23:51:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 249. [2022-11-25 23:51:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2158590308370043) internal successors, (276), 236 states have internal predecessors, (276), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-11-25 23:51:41,796 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 49 [2022-11-25 23:51:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:41,797 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-11-25 23:51:41,797 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) [2022-11-25 23:51:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-11-25 23:51:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:51:41,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:41,798 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] [2022-11-25 23:51:41,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:42,005 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1900127767, now seen corresponding path program 1 times [2022-11-25 23:51:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:42,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075434780] [2022-11-25 23:51:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:51:42,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:42,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075434780] [2022-11-25 23:51:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075434780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731870455] [2022-11-25 23:51:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:42,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:42,359 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:42,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 23:51:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:51:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:42,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:42,694 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 [2022-11-25 23:51:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:51:42,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:42,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731870455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016181753] [2022-11-25 23:51:42,939 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:51:42,939 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:42,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:42,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:42,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,188 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-25 23:51:43,188 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 [2022-11-25 23:51:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,276 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-25 23:51:43,276 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 [2022-11-25 23:51:43,616 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-25 23:51:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,867 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:51:43,867 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 [2022-11-25 23:51:43,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:43,958 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:51:43,958 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 [2022-11-25 23:51:44,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:46,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19559#(and (<= |parse_input_~input#1.offset| 0) (<= (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|)) (<= 0 |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_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:46,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:46,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:51:46,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-25 23:51:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390737687] [2022-11-25 23:51:46,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:46,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:51:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:51:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:51:46,656 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:51:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:47,141 INFO L93 Difference]: Finished difference Result 257 states and 296 transitions. [2022-11-25 23:51:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:51:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-25 23:51:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:47,143 INFO L225 Difference]: With dead ends: 257 [2022-11-25 23:51:47,143 INFO L226 Difference]: Without dead ends: 257 [2022-11-25 23:51:47,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 23:51:47,144 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 304 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:47,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 192 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:51:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-25 23:51:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 248. [2022-11-25 23:51:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 227 states have (on average 1.1894273127753303) internal successors, (270), 235 states have internal predecessors, (270), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2022-11-25 23:51:47,150 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 50 [2022-11-25 23:51:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:47,156 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2022-11-25 23:51:47,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:51:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2022-11-25 23:51:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 23:51:47,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:47,161 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] [2022-11-25 23:51:47,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:47,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 23:51:47,367 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -920722335, now seen corresponding path program 1 times [2022-11-25 23:51:47,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:47,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022567753] [2022-11-25 23:51:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:47,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:47,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:47,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022567753] [2022-11-25 23:51:47,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022567753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:47,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413938014] [2022-11-25 23:51:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:47,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:47,852 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:47,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:51:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:51:47,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:48,070 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:51:48,071 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 [2022-11-25 23:51:48,197 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| Int) (v_ArrVal_176 Int)) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| 1) |c_old(~global~0.base)| v_ArrVal_176))) is different from true [2022-11-25 23:51:48,228 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-25 23:51:48,228 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 [2022-11-25 23:51:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 23:51:48,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413938014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [91806392] [2022-11-25 23:51:48,695 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 23:51:48,695 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:48,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:48,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:48,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:48,835 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-25 23:51:48,835 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 [2022-11-25 23:51:49,080 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:51:49,080 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 [2022-11-25 23:51:49,271 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-25 23:51:49,271 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 [2022-11-25 23:51:49,292 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:49,378 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:51:49,764 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-25 23:51:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:49,894 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:51:49,894 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 [2022-11-25 23:51:49,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:49,917 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-25 23:51:49,917 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 [2022-11-25 23:51:50,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:50,075 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-25 23:51:50,075 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 [2022-11-25 23:51:50,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:53,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20365#(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 [2022-11-25 23:51:53,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:53,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:51:53,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-25 23:51:53,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349230800] [2022-11-25 23:51:53,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:53,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:51:53,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:51:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1428, Unknown=1, NotChecked=78, Total=1722 [2022-11-25 23:51:53,523 INFO L87 Difference]: Start difference. First operand 248 states and 288 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) [2022-11-25 23:51:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:54,552 INFO L93 Difference]: Finished difference Result 253 states and 293 transitions. [2022-11-25 23:51:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:51:54,552 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 [2022-11-25 23:51:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:54,554 INFO L225 Difference]: With dead ends: 253 [2022-11-25 23:51:54,554 INFO L226 Difference]: Without dead ends: 253 [2022-11-25 23:51:54,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=422, Invalid=2337, Unknown=1, NotChecked=102, Total=2862 [2022-11-25 23:51:54,555 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 312 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:54,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 265 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 365 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-11-25 23:51:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-25 23:51:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2022-11-25 23:51:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 227 states have (on average 1.1850220264317182) internal successors, (269), 234 states have internal predecessors, (269), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:51:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 287 transitions. [2022-11-25 23:51:54,562 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 287 transitions. Word has length 51 [2022-11-25 23:51:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:54,562 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 287 transitions. [2022-11-25 23:51:54,562 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) [2022-11-25 23:51:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 287 transitions. [2022-11-25 23:51:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 23:51:54,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:54,563 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] [2022-11-25 23:51:54,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:54,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:54,770 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:51:54,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1822194776, now seen corresponding path program 1 times [2022-11-25 23:51:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423374913] [2022-11-25 23:51:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:55,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423374913] [2022-11-25 23:51:55,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423374913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429241608] [2022-11-25 23:51:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:55,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:55,567 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:55,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:51:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:55,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:51:55,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:55,986 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:51:55,986 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 [2022-11-25 23:51:56,332 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-25 23:51:56,333 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 [2022-11-25 23:51:56,498 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 [2022-11-25 23:51:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:56,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429241608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444490621] [2022-11-25 23:51:56,709 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-25 23:51:56,709 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:56,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:56,710 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:56,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:56,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:56,926 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-25 23:51:56,927 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 [2022-11-25 23:51:56,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:57,010 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-25 23:51:57,011 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 [2022-11-25 23:51:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:57,246 INFO L321 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-11-25 23:51:57,246 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 379 treesize of output 404 [2022-11-25 23:51:57,828 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-25 23:51:58,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:58,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:58,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:58,218 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-25 23:51:58,218 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 232 treesize of output 246 [2022-11-25 23:51:58,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:58,328 INFO L321 Elim1Store]: treesize reduction 197, result has 30.9 percent of original size [2022-11-25 23:51:58,329 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 13 case distinctions, treesize of input 221 treesize of output 270 [2022-11-25 23:51:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:58,716 INFO L321 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2022-11-25 23:51:58,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 547 treesize of output 551 [2022-11-25 23:51:59,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:07,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21148#(and (<= 0 ~global~0.offset) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (or (and (= (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$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|)))) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|))) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|))) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5))' at error location [2022-11-25 23:52:07,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:07,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:52:07,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-11-25 23:52:07,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722777089] [2022-11-25 23:52:07,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 23:52:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 23:52:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2207, Unknown=6, NotChecked=0, Total=2450 [2022-11-25 23:52:07,860 INFO L87 Difference]: Start difference. First operand 247 states and 287 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) [2022-11-25 23:52:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:09,649 INFO L93 Difference]: Finished difference Result 318 states and 363 transitions. [2022-11-25 23:52:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:52:09,651 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 [2022-11-25 23:52:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:09,652 INFO L225 Difference]: With dead ends: 318 [2022-11-25 23:52:09,652 INFO L226 Difference]: Without dead ends: 318 [2022-11-25 23:52:09,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=528, Invalid=3498, Unknown=6, NotChecked=0, Total=4032 [2022-11-25 23:52:09,653 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 550 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 97 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:09,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 220 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 513 Invalid, 17 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:52:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-25 23:52:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2022-11-25 23:52:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 225 states have (on average 1.1822222222222223) internal successors, (266), 231 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:52:09,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2022-11-25 23:52:09,659 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 57 [2022-11-25 23:52:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:09,659 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2022-11-25 23:52:09,659 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) [2022-11-25 23:52:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2022-11-25 23:52:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 23:52:09,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:09,663 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:09,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:09,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:09,864 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash 631491711, now seen corresponding path program 1 times [2022-11-25 23:52:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:09,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474541317] [2022-11-25 23:52:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:09,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:52:09,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474541317] [2022-11-25 23:52:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474541317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444547642] [2022-11-25 23:52:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:09,932 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:09,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 23:52:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:52:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:52:10,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:52:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444547642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464019477] [2022-11-25 23:52:10,137 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:52:10,137 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:10,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:10,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:10,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:10,369 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-25 23:52:10,369 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 [2022-11-25 23:52:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:10,474 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-25 23:52:10,475 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 [2022-11-25 23:52:10,849 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-25 23:52:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:11,192 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 23:52:11,193 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 [2022-11-25 23:52:11,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:11,258 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-25 23:52:11,259 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 [2022-11-25 23:52:11,520 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:14,777 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22104#(and (<= |parse_input_~input#1.offset| 0) (= |parse_input_c1_~x~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (not (= ~global~0.offset 0)) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$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|)) (<= |parse_input_~input#1.base| 5) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 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|) (<= (+ (* 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))' at error location [2022-11-25 23:52:14,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:14,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:14,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-25 23:52:14,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012452191] [2022-11-25 23:52:14,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:14,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:52:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:52:14,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:52:14,780 INFO L87 Difference]: Start difference. First operand 244 states and 284 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-11-25 23:52:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:14,813 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2022-11-25 23:52:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 58 [2022-11-25 23:52:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:14,815 INFO L225 Difference]: With dead ends: 249 [2022-11-25 23:52:14,815 INFO L226 Difference]: Without dead ends: 249 [2022-11-25 23:52:14,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:52:14,816 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:14,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-25 23:52:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2022-11-25 23:52:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 224 states have (on average 1.1741071428571428) internal successors, (263), 229 states have internal predecessors, (263), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-25 23:52:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 281 transitions. [2022-11-25 23:52:14,822 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 281 transitions. Word has length 58 [2022-11-25 23:52:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:14,822 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 281 transitions. [2022-11-25 23:52:14,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-11-25 23:52:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 281 transitions. [2022-11-25 23:52:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 23:52:14,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:14,824 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] [2022-11-25 23:52:14,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:15,030 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 635004488, now seen corresponding path program 1 times [2022-11-25 23:52:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:15,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395958867] [2022-11-25 23:52:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:15,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:15,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395958867] [2022-11-25 23:52:15,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395958867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:15,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768419523] [2022-11-25 23:52:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:15,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:15,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:15,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:15,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:52:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:52:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:15,491 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 [2022-11-25 23:52:15,652 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 23:52:15,652 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 [2022-11-25 23:52:15,687 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:52:15,687 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 [2022-11-25 23:52:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:15,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:15,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768419523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:15,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706998751] [2022-11-25 23:52:15,798 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 23:52:15,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:15,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:15,799 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:15,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:15,904 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-25 23:52:15,905 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 [2022-11-25 23:52:15,927 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-25 23:52:15,927 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 [2022-11-25 23:52:16,054 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-25 23:52:16,054 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 [2022-11-25 23:52:16,350 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-25 23:52:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:16,464 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-25 23:52:16,464 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 [2022-11-25 23:52:16,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:16,598 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-25 23:52:16,599 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 [2022-11-25 23:52:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:16,763 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-25 23:52:16,763 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 [2022-11-25 23:52:16,790 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:52:16,839 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:52:16,876 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-25 23:52:16,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:20,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22868#(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 [2022-11-25 23:52:20,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:20,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:52:20,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-25 23:52:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640024532] [2022-11-25 23:52:20,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:52:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:52:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:52:20,597 INFO L87 Difference]: Start difference. First operand 242 states and 281 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) [2022-11-25 23:52:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:20,943 INFO L93 Difference]: Finished difference Result 294 states and 339 transitions. [2022-11-25 23:52:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:52:20,944 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 [2022-11-25 23:52:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:20,945 INFO L225 Difference]: With dead ends: 294 [2022-11-25 23:52:20,945 INFO L226 Difference]: Without dead ends: 294 [2022-11-25 23:52:20,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:52:20,946 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:20,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 224 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-25 23:52:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 282. [2022-11-25 23:52:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 267 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-25 23:52:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2022-11-25 23:52:20,953 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 62 [2022-11-25 23:52:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:20,953 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2022-11-25 23:52:20,953 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) [2022-11-25 23:52:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2022-11-25 23:52:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:52:20,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:20,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:52:20,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:21,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 23:52:21,161 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 476729907, now seen corresponding path program 1 times [2022-11-25 23:52:21,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558957348] [2022-11-25 23:52:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:52:21,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:21,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558957348] [2022-11-25 23:52:21,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558957348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:21,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933983780] [2022-11-25 23:52:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:21,292 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:21,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 23:52:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:52:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:52:21,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:52:21,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933983780] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:21,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:52:21,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 9 [2022-11-25 23:52:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855787398] [2022-11-25 23:52:21,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:21,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:52:21,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:52:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:52:21,709 INFO L87 Difference]: Start difference. First operand 282 states and 328 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-11-25 23:52:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:21,795 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-11-25 23:52:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:52:21,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 63 [2022-11-25 23:52:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:21,797 INFO L225 Difference]: With dead ends: 258 [2022-11-25 23:52:21,797 INFO L226 Difference]: Without dead ends: 250 [2022-11-25 23:52:21,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:52:21,797 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 48 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:21,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-25 23:52:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 196. [2022-11-25 23:52:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 183 states have (on average 1.1639344262295082) internal successors, (213), 185 states have internal predecessors, (213), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 23:52:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2022-11-25 23:52:21,804 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 63 [2022-11-25 23:52:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:21,805 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2022-11-25 23:52:21,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-11-25 23:52:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2022-11-25 23:52:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 23:52:21,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:21,806 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] [2022-11-25 23:52:21,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:22,007 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1831591415, now seen corresponding path program 1 times [2022-11-25 23:52:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:52:22,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734124376] [2022-11-25 23:52:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:52:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:52:22,050 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:52:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:52:22,113 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 23:52:22,113 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:52:22,115 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-25 23:52:22,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-25 23:52:22,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-25 23:52:22,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-25 23:52:22,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-25 23:52:22,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-25 23:52:22,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-25 23:52:22,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-25 23:52:22,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-25 23:52:22,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-25 23:52:22,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-25 23:52:22,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-25 23:52:22,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-25 23:52:22,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-25 23:52:22,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-25 23:52:22,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-25 23:52:22,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-25 23:52:22,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-25 23:52:22,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-25 23:52:22,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-25 23:52:22,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 23:52:22,124 INFO L445 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, 1] [2022-11-25 23:52:22,128 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:52:22,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:52:22 BoogieIcfgContainer [2022-11-25 23:52:22,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:52:22,229 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:52:22,229 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:52:22,230 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:52:22,230 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:48:43" (3/4) ... [2022-11-25 23:52:22,233 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 23:52:22,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:52:22,234 INFO L158 Benchmark]: Toolchain (without parser) took 220127.39ms. Allocated memory was 151.0MB in the beginning and 383.8MB in the end (delta: 232.8MB). Free memory was 118.9MB in the beginning and 162.6MB in the end (delta: -43.7MB). Peak memory consumption was 191.7MB. Max. memory is 16.1GB. [2022-11-25 23:52:22,234 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory was 86.7MB in the beginning and 86.7MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:52:22,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 721.85ms. Allocated memory is still 151.0MB. Free memory was 118.9MB in the beginning and 99.5MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-25 23:52:22,234 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.37ms. Allocated memory is still 151.0MB. Free memory was 99.5MB in the beginning and 97.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:52:22,235 INFO L158 Benchmark]: Boogie Preprocessor took 65.03ms. Allocated memory is still 151.0MB. Free memory was 97.4MB in the beginning and 95.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:52:22,235 INFO L158 Benchmark]: RCFGBuilder took 534.74ms. Allocated memory is still 151.0MB. Free memory was 95.9MB in the beginning and 78.5MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-25 23:52:22,235 INFO L158 Benchmark]: TraceAbstraction took 218710.52ms. Allocated memory was 151.0MB in the beginning and 383.8MB in the end (delta: 232.8MB). Free memory was 77.8MB in the beginning and 162.6MB in the end (delta: -84.8MB). Peak memory consumption was 149.7MB. Max. memory is 16.1GB. [2022-11-25 23:52:22,235 INFO L158 Benchmark]: Witness Printer took 4.71ms. Allocated memory is still 383.8MB. Free memory is still 162.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:52:22,236 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory was 86.7MB in the beginning and 86.7MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 721.85ms. Allocated memory is still 151.0MB. Free memory was 118.9MB in the beginning and 99.5MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.37ms. Allocated memory is still 151.0MB. Free memory was 99.5MB in the beginning and 97.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.03ms. Allocated memory is still 151.0MB. Free memory was 97.4MB in the beginning and 95.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 534.74ms. Allocated memory is still 151.0MB. Free memory was 95.9MB in the beginning and 78.5MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 218710.52ms. Allocated memory was 151.0MB in the beginning and 383.8MB in the end (delta: 232.8MB). Free memory was 77.8MB in the beginning and 162.6MB in the end (delta: -84.8MB). Peak memory consumption was 149.7MB. Max. memory is 16.1GB. * Witness Printer took 4.71ms. Allocated memory is still 383.8MB. Free memory is still 162.6MB. 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: 721]: 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 721. 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} }; [L722] 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 FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, 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=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, 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: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: 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: 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, 58 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 218.5s, OverallIterations: 35, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 mSolverCounterUnknown, 7710 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7709 mSDsluCounter, 6567 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 62 IncrementalHoareTripleChecker+Unchecked, 4954 mSDsCounter, 963 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6576 IncrementalHoareTripleChecker+Invalid, 7632 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 963 mSolverCounterUnsat, 1613 mSDtfsCounter, 6576 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2970 GetRequests, 1965 SyntacticMatches, 79 SemanticMatches, 926 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12904 ImplicationChecksByTransitivity, 150.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=430occurred in iteration=22, InterpolantAutomatonStates: 327, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 34 MinimizatonAttempts, 1441 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 24.7s InterpolantComputationTime, 2244 NumberOfCodeBlocks, 2244 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2636 ConstructedInterpolants, 149 QuantifiedInterpolants, 24877 SizeOfPredicates, 105 NumberOfNonLiveVariables, 6937 ConjunctsInSsa, 471 ConjunctsInUnsatCore, 73 InterpolantComputations, 12 PerfectInterpolantSequences, 917/1594 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: 4.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 58, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 141, TOOLS_POST_TIME: 3.2s, TOOLS_POST_CALL_APPLICATIONS: 9, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 154, TOOLS_QUANTIFIERELIM_TIME: 3.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 236, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 58, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 1.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.4s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, 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: 692, DAG_COMPRESSION_RETAINED_NODES: 172, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 23:52:22,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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-38b53e6 [2022-11-25 23:52:24,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:52:24,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:52:24,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:52:24,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:52:24,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:52:24,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:52:24,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:52:24,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:52:24,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:52:24,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:52:24,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:52:24,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:52:24,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:52:24,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:52:24,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:52:24,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:52:24,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:52:24,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:52:24,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:52:24,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:52:24,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:52:24,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:52:24,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:52:24,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:52:24,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:52:24,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:52:24,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:52:24,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:52:24,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:52:24,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:52:24,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:52:24,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:52:24,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:52:24,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:52:24,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:52:24,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:52:24,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:52:24,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:52:24,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:52:24,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:52:24,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:52:24,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:52:24,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:52:24,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:52:24,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:52:24,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:52:24,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:52:24,918 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:52:24,918 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:52:24,918 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:52:24,919 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:52:24,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:52:24,920 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:52:24,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:52:24,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:52:24,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:52:24,922 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:52:24,922 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:52:24,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:52:24,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:52:24,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:52:24,923 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:52:24,924 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:52:24,924 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:52:24,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:52:24,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:52:24,925 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:52:24,925 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:52:24,925 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:52:24,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:52:24,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:52:24,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:52:24,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:52:24,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:52:24,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:52:24,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:52:24,928 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:52:24,929 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:24,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:52:24,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:52:24,930 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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-25 23:52:25,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:52:25,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:52:25,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:52:25,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:52:25,433 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:52:25,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-25 23:52:28,474 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:52:28,784 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:52:28,800 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-25 23:52:28,812 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data/498af8430/b110a8c3ab934cd5828a00fcc66c8218/FLAGa63dcb4f9 [2022-11-25 23:52:28,833 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/data/498af8430/b110a8c3ab934cd5828a00fcc66c8218 [2022-11-25 23:52:28,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:52:28,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:52:28,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:52:28,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:52:28,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:52:28,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:52:28" (1/1) ... [2022-11-25 23:52:28,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c28ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:28, skipping insertion in model container [2022-11-25 23:52:28,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:52:28" (1/1) ... [2022-11-25 23:52:28,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:52:28,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:52:29,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:52:29,378 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:52:29,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:52:29,500 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:52:29,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29 WrapperNode [2022-11-25 23:52:29,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:52:29,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:52:29,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:52:29,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:52:29,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,572 INFO L138 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-11-25 23:52:29,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:52:29,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:52:29,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:52:29,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:52:29,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:52:29,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:52:29,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:52:29,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:52:29,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (1/1) ... [2022-11-25 23:52:29,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:52:29,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:29,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:52:29,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:52:29,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-25 23:52:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-25 23:52:29,762 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-25 23:52:29,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:52:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:52:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:52:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:52:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:52:29,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:52:29,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:52:29,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:52:29,900 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:52:29,902 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:52:30,298 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:52:30,304 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:52:30,305 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:52:30,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:52:30 BoogieIcfgContainer [2022-11-25 23:52:30,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:52:30,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:52:30,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:52:30,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:52:30,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:52:28" (1/3) ... [2022-11-25 23:52:30,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9799b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:52:30, skipping insertion in model container [2022-11-25 23:52:30,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:52:29" (2/3) ... [2022-11-25 23:52:30,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9799b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:52:30, skipping insertion in model container [2022-11-25 23:52:30,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:52:30" (3/3) ... [2022-11-25 23:52:30,327 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-25 23:52:30,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:52:30,346 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-25 23:52:30,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:52:30,398 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;@65c27bef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:52:30,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-25 23:52:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 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) [2022-11-25 23:52:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:52:30,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:30,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:52:30,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:30,417 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-11-25 23:52:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:30,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923882749] [2022-11-25 23:52:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:30,431 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 [2022-11-25 23:52:30,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:30,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:30,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:52:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:30,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:30,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923882749] [2022-11-25 23:52:30,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923882749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:30,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:30,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:52:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591577624] [2022-11-25 23:52:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:52:30,801 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 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) [2022-11-25 23:52:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:31,026 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-11-25 23:52:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:31,033 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 [2022-11-25 23:52:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:31,043 INFO L225 Difference]: With dead ends: 110 [2022-11-25 23:52:31,044 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 23:52:31,046 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 [2022-11-25 23:52:31,050 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:31,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 23:52:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-11-25 23:52:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 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) [2022-11-25 23:52:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-11-25 23:52:31,118 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-11-25 23:52:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:31,119 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-11-25 23:52:31,119 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) [2022-11-25 23:52:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-11-25 23:52:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:52:31,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:31,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:52:31,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:31,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:31,338 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-11-25 23:52:31,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:31,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373008697] [2022-11-25 23:52:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:31,340 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 [2022-11-25 23:52:31,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:31,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:31,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:52:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:31,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:31,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373008697] [2022-11-25 23:52:31,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373008697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:31,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:31,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:52:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382693775] [2022-11-25 23:52:31,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:52:31,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:52:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:52:31,558 INFO L87 Difference]: Start difference. First operand 84 states and 110 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) [2022-11-25 23:52:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:31,815 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-11-25 23:52:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:52:31,816 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 [2022-11-25 23:52:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:31,818 INFO L225 Difference]: With dead ends: 206 [2022-11-25 23:52:31,818 INFO L226 Difference]: Without dead ends: 206 [2022-11-25 23:52:31,819 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 [2022-11-25 23:52:31,820 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 124 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 142 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 [2022-11-25 23:52:31,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 142 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-25 23:52:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-11-25 23:52:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 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) [2022-11-25 23:52:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-11-25 23:52:31,846 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-11-25 23:52:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:31,847 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-11-25 23:52:31,848 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) [2022-11-25 23:52:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-11-25 23:52:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:52:31,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:31,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:31,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:32,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:32,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-11-25 23:52:32,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690326313] [2022-11-25 23:52:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:32,065 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 [2022-11-25 23:52:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:32,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:52:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:32,299 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 [2022-11-25 23:52:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:32,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:32,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690326313] [2022-11-25 23:52:32,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690326313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:32,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011837400] [2022-11-25 23:52:32,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:32,320 INFO L87 Difference]: Start difference. First operand 152 states and 238 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) [2022-11-25 23:52:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:32,664 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-11-25 23:52:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:32,665 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 [2022-11-25 23:52:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:32,667 INFO L225 Difference]: With dead ends: 228 [2022-11-25 23:52:32,667 INFO L226 Difference]: Without dead ends: 228 [2022-11-25 23:52:32,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:52:32,669 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 135 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:32,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 164 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:52:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-25 23:52:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-11-25 23:52:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 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) [2022-11-25 23:52:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-11-25 23:52:32,686 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-11-25 23:52:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:32,687 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-11-25 23:52:32,687 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) [2022-11-25 23:52:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-11-25 23:52:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:52:32,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:32,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:32,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:32,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:32,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-11-25 23:52:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:32,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97933551] [2022-11-25 23:52:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:32,901 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 [2022-11-25 23:52:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:32,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:32,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:52:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:33,170 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 [2022-11-25 23:52:33,174 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 [2022-11-25 23:52:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:33,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:33,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97933551] [2022-11-25 23:52:33,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97933551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:33,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:33,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388522643] [2022-11-25 23:52:33,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:33,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:33,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:33,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:33,215 INFO L87 Difference]: Start difference. First operand 155 states and 241 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) [2022-11-25 23:52:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:33,489 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-11-25 23:52:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:33,492 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 [2022-11-25 23:52:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:33,493 INFO L225 Difference]: With dead ends: 208 [2022-11-25 23:52:33,493 INFO L226 Difference]: Without dead ends: 208 [2022-11-25 23:52:33,493 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 [2022-11-25 23:52:33,494 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 127 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 190 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 [2022-11-25 23:52:33,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-25 23:52:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-11-25 23:52:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 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) [2022-11-25 23:52:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-11-25 23:52:33,527 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-11-25 23:52:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:33,527 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-11-25 23:52:33,527 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) [2022-11-25 23:52:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-11-25 23:52:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:52:33,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:33,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:33,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:33,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:33,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-11-25 23:52:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:33,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019846754] [2022-11-25 23:52:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:33,730 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 [2022-11-25 23:52:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:33,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:52:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:33,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:33,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019846754] [2022-11-25 23:52:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019846754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:33,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:33,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609693259] [2022-11-25 23:52:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:33,874 INFO L87 Difference]: Start difference. First operand 155 states and 239 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) [2022-11-25 23:52:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:34,060 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-11-25 23:52:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:34,060 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 [2022-11-25 23:52:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:34,062 INFO L225 Difference]: With dead ends: 234 [2022-11-25 23:52:34,062 INFO L226 Difference]: Without dead ends: 234 [2022-11-25 23:52:34,062 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 [2022-11-25 23:52:34,063 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 134 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:34,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-25 23:52:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-11-25 23:52:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 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) [2022-11-25 23:52:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-11-25 23:52:34,091 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-11-25 23:52:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:34,092 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-11-25 23:52:34,092 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) [2022-11-25 23:52:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-11-25 23:52:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:52:34,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:34,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:34,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:34,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:34,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-11-25 23:52:34,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:34,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583566548] [2022-11-25 23:52:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:34,305 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 [2022-11-25 23:52:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:34,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:34,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:34,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:52:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:34,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:34,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583566548] [2022-11-25 23:52:34,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583566548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:34,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:34,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:34,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216765143] [2022-11-25 23:52:34,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:34,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:52:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:52:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:52:34,493 INFO L87 Difference]: Start difference. First operand 191 states and 289 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) [2022-11-25 23:52:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:34,693 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-11-25 23:52:34,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:52:34,694 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 [2022-11-25 23:52:34,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:34,695 INFO L225 Difference]: With dead ends: 231 [2022-11-25 23:52:34,695 INFO L226 Difference]: Without dead ends: 231 [2022-11-25 23:52:34,695 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 [2022-11-25 23:52:34,696 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 122 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:34,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:52:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-25 23:52:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-11-25 23:52:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 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) [2022-11-25 23:52:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-11-25 23:52:34,708 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-11-25 23:52:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:34,708 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-11-25 23:52:34,709 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) [2022-11-25 23:52:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-11-25 23:52:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:52:34,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:34,710 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:34,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:34,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:34,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:34,925 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-11-25 23:52:34,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:34,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419793646] [2022-11-25 23:52:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:34,926 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 [2022-11-25 23:52:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:34,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:34,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:52:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:35,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:35,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:35,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419793646] [2022-11-25 23:52:35,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419793646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917169291] [2022-11-25 23:52:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:35,621 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:35,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-25 23:52:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:52:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:35,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:36,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917169291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:36,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527827303] [2022-11-25 23:52:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:36,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:36,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:36,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:52:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:36,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:52:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:36,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:36,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527827303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:36,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:36,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-25 23:52:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019249115] [2022-11-25 23:52:36,566 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:52:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:52:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:52:36,567 INFO L87 Difference]: Start difference. First operand 201 states and 302 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) [2022-11-25 23:52:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:37,172 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-11-25 23:52:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:52:37,173 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 [2022-11-25 23:52:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:37,175 INFO L225 Difference]: With dead ends: 367 [2022-11-25 23:52:37,175 INFO L226 Difference]: Without dead ends: 367 [2022-11-25 23:52:37,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:52:37,176 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 245 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:37,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 312 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:52:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-25 23:52:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-11-25 23:52:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-11-25 23:52:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-11-25 23:52:37,191 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-11-25 23:52:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:37,192 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-11-25 23:52:37,192 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) [2022-11-25 23:52:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-11-25 23:52:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:52:37,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:37,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:37,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:37,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:37,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 23:52:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:37,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-11-25 23:52:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:37,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363947227] [2022-11-25 23:52:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:37,797 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 [2022-11-25 23:52:37,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:37,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:37,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:37,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:52:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:38,127 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 [2022-11-25 23:52:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:38,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:38,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363947227] [2022-11-25 23:52:38,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363947227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1428439299] [2022-11-25 23:52:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:38,329 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:38,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-25 23:52:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:52:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:38,782 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 [2022-11-25 23:52:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:38,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1428439299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848790626] [2022-11-25 23:52:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:38,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:38,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:38,913 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:38,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:52:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:52:38,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:39,382 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 [2022-11-25 23:52:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:39,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:39,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848790626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:39,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:39,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-25 23:52:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369813038] [2022-11-25 23:52:39,819 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:39,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:52:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:52:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:52:39,821 INFO L87 Difference]: Start difference. First operand 239 states and 363 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) [2022-11-25 23:52:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:42,142 INFO L93 Difference]: Finished difference Result 601 states and 793 transitions. [2022-11-25 23:52:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:52:42,143 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 [2022-11-25 23:52:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:42,145 INFO L225 Difference]: With dead ends: 601 [2022-11-25 23:52:42,146 INFO L226 Difference]: Without dead ends: 601 [2022-11-25 23:52:42,146 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 [2022-11-25 23:52:42,147 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1299 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:42,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 506 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 23:52:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-25 23:52:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 307. [2022-11-25 23:52:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 267 states have (on average 1.6254681647940075) internal successors, (434), 292 states have internal predecessors, (434), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-25 23:52:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2022-11-25 23:52:42,190 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 15 [2022-11-25 23:52:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:42,190 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2022-11-25 23:52:42,190 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) [2022-11-25 23:52:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2022-11-25 23:52:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:52:42,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:42,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:42,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:42,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:42,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:42,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:42,804 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-11-25 23:52:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:42,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322086044] [2022-11-25 23:52:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:42,805 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 [2022-11-25 23:52:42,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:42,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:42,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:52:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:43,160 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 [2022-11-25 23:52:43,166 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 [2022-11-25 23:52:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:43,390 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:43,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322086044] [2022-11-25 23:52:43,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322086044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:43,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262024032] [2022-11-25 23:52:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:43,391 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:43,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:43,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:43,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-25 23:52:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:43,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:52:43,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:43,756 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 [2022-11-25 23:52:43,762 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 [2022-11-25 23:52:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:43,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262024032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231012309] [2022-11-25 23:52:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:43,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:43,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:43,888 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:52:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:52:43,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:44,413 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 [2022-11-25 23:52:44,419 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 [2022-11-25 23:52:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:44,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:44,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231012309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:44,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:44,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-25 23:52:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231550283] [2022-11-25 23:52:44,861 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:52:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:52:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:52:44,863 INFO L87 Difference]: Start difference. First operand 307 states and 475 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) [2022-11-25 23:52:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:47,637 INFO L93 Difference]: Finished difference Result 830 states and 1133 transitions. [2022-11-25 23:52:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:52:47,637 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 [2022-11-25 23:52:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:47,641 INFO L225 Difference]: With dead ends: 830 [2022-11-25 23:52:47,641 INFO L226 Difference]: Without dead ends: 830 [2022-11-25 23:52:47,642 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 [2022-11-25 23:52:47,643 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1131 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:47,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 628 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 23:52:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-11-25 23:52:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 422. [2022-11-25 23:52:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 375 states have (on average 1.6426666666666667) internal successors, (616), 403 states have internal predecessors, (616), 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) [2022-11-25 23:52:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 675 transitions. [2022-11-25 23:52:47,667 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 675 transitions. Word has length 16 [2022-11-25 23:52:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:47,667 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 675 transitions. [2022-11-25 23:52:47,668 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) [2022-11-25 23:52:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 675 transitions. [2022-11-25 23:52:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:52:47,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:47,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:47,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:52:47,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:48,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:48,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-11-25 23:52:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549087596] [2022-11-25 23:52:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:48,282 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 [2022-11-25 23:52:48,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:48,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:48,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:52:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:48,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:48,439 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:48,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549087596] [2022-11-25 23:52:48,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549087596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:48,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:48,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:52:48,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913771510] [2022-11-25 23:52:48,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:48,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:48,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:52:48,441 INFO L87 Difference]: Start difference. First operand 422 states and 675 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) [2022-11-25 23:52:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:48,476 INFO L93 Difference]: Finished difference Result 420 states and 622 transitions. [2022-11-25 23:52:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:48,477 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 [2022-11-25 23:52:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:48,479 INFO L225 Difference]: With dead ends: 420 [2022-11-25 23:52:48,479 INFO L226 Difference]: Without dead ends: 420 [2022-11-25 23:52:48,479 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 [2022-11-25 23:52:48,480 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:48,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-25 23:52:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 397. [2022-11-25 23:52:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 350 states have (on average 1.5742857142857143) internal successors, (551), 377 states have internal predecessors, (551), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2022-11-25 23:52:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 603 transitions. [2022-11-25 23:52:48,496 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 603 transitions. Word has length 18 [2022-11-25 23:52:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:48,496 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 603 transitions. [2022-11-25 23:52:48,496 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) [2022-11-25 23:52:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 603 transitions. [2022-11-25 23:52:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:52:48,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:48,498 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 23:52:48,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:48,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:48,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-11-25 23:52:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:48,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301943481] [2022-11-25 23:52:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:52:48,712 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 [2022-11-25 23:52:48,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:48,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:48,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:48,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:52:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:48,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:52:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:49,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:49,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301943481] [2022-11-25 23:52:49,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301943481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409282253] [2022-11-25 23:52:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:52:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:49,821 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:49,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-25 23:52:49,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:52:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:52:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:50,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:50,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409282253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:50,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860951148] [2022-11-25 23:52:50,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:52:50,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:50,217 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:50,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:52:50,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:52:50,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:52:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:50,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:50,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860951148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:50,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:50,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-25 23:52:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601143635] [2022-11-25 23:52:50,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:52:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:52:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:52:50,395 INFO L87 Difference]: Start difference. First operand 397 states and 603 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) [2022-11-25 23:52:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:51,263 INFO L93 Difference]: Finished difference Result 495 states and 681 transitions. [2022-11-25 23:52:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:52:51,264 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 [2022-11-25 23:52:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:51,267 INFO L225 Difference]: With dead ends: 495 [2022-11-25 23:52:51,267 INFO L226 Difference]: Without dead ends: 495 [2022-11-25 23:52:51,267 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 [2022-11-25 23:52:51,268 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 475 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:51,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 484 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:52:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-25 23:52:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2022-11-25 23:52:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 288 states have (on average 1.5104166666666667) internal successors, (435), 316 states have internal predecessors, (435), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-25 23:52:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 482 transitions. [2022-11-25 23:52:51,293 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 482 transitions. Word has length 22 [2022-11-25 23:52:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:51,295 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 482 transitions. [2022-11-25 23:52:51,295 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) [2022-11-25 23:52:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 482 transitions. [2022-11-25 23:52:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:52:51,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:51,298 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] [2022-11-25 23:52:51,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:51,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:52:51,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:51,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:51,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-11-25 23:52:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961508451] [2022-11-25 23:52:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:51,900 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 [2022-11-25 23:52:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:51,901 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:51,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 23:52:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:52:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:52,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:52:52,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961508451] [2022-11-25 23:52:52,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961508451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:52:52,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:52:52,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:52:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001477281] [2022-11-25 23:52:52,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:52:52,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:52:52,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:52:52,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:52:52,009 INFO L87 Difference]: Start difference. First operand 336 states and 482 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) [2022-11-25 23:52:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:52,016 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2022-11-25 23:52:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:52:52,016 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 [2022-11-25 23:52:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:52,018 INFO L225 Difference]: With dead ends: 259 [2022-11-25 23:52:52,019 INFO L226 Difference]: Without dead ends: 259 [2022-11-25 23:52:52,019 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 [2022-11-25 23:52:52,020 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 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 [2022-11-25 23:52:52,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:52:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-25 23:52:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-11-25 23:52:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 219 states have (on average 1.5068493150684932) internal successors, (330), 244 states have internal predecessors, (330), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-25 23:52:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-11-25 23:52:52,033 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 25 [2022-11-25 23:52:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:52,033 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-11-25 23:52:52,033 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) [2022-11-25 23:52:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-11-25 23:52:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 23:52:52,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:52,038 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] [2022-11-25 23:52:52,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:52:52,250 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:52:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-11-25 23:52:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:52,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511274839] [2022-11-25 23:52:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:52,252 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 [2022-11-25 23:52:52,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:52,253 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:52,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 23:52:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:52:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:54,745 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 [2022-11-25 23:52:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:54,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:57,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511274839] [2022-11-25 23:52:57,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511274839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:57,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [632416665] [2022-11-25 23:52:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:57,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:57,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:57,264 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:57,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-25 23:52:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:52:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:59,878 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 [2022-11-25 23:52:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:59,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:02,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [632416665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:53:02,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451515627] [2022-11-25 23:53:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:02,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:02,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:02,369 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:02,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:53:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:53:02,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:04,755 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:53:04,756 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 [2022-11-25 23:53:05,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:05,133 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 [2022-11-25 23:53:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:05,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:05,371 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:53:05,371 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 [2022-11-25 23:53:08,292 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:53:08,292 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 [2022-11-25 23:53:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:10,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451515627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:10,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-25 23:53:10,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-11-25 23:53:10,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232901733] [2022-11-25 23:53:10,496 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:10,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:53:10,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:10,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:53:10,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=152, Unknown=8, NotChecked=0, Total=210 [2022-11-25 23:53:10,498 INFO L87 Difference]: Start difference. First operand 259 states and 362 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) [2022-11-25 23:53:13,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:17,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:19,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:23,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:25,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:27,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:29,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:33,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:42,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:44,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:52,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:53:54,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:54:00,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:54:02,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:54:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:02,837 INFO L93 Difference]: Finished difference Result 397 states and 512 transitions. [2022-11-25 23:54:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:54:02,838 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 [2022-11-25 23:54:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:02,840 INFO L225 Difference]: With dead ends: 397 [2022-11-25 23:54:02,840 INFO L226 Difference]: Without dead ends: 397 [2022-11-25 23:54:02,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=248, Invalid=546, Unknown=18, NotChecked=0, Total=812 [2022-11-25 23:54:02,841 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 382 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 99 mSolverCounterUnsat, 57 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 57 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:02,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 145 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 155 Invalid, 57 Unknown, 0 Unchecked, 29.0s Time] [2022-11-25 23:54:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-25 23:54:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 269. [2022-11-25 23:54:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 231 states have (on average 1.393939393939394) internal successors, (322), 254 states have internal predecessors, (322), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-25 23:54:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 356 transitions. [2022-11-25 23:54:02,852 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 356 transitions. Word has length 27 [2022-11-25 23:54:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:02,853 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 356 transitions. [2022-11-25 23:54:02,853 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) [2022-11-25 23:54:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 356 transitions. [2022-11-25 23:54:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:54:02,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:02,854 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] [2022-11-25 23:54:02,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:03,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:03,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-25 23:54:03,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:03,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:54:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-11-25 23:54:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:03,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155104195] [2022-11-25 23:54:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:03,468 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 [2022-11-25 23:54:03,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:03,469 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:54:03,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 23:54:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:03,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:54:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:03,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:03,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155104195] [2022-11-25 23:54:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155104195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990615110] [2022-11-25 23:54:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:03,928 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:03,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:03,932 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:03,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-25 23:54:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:04,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:54:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:04,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:04,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990615110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070619817] [2022-11-25 23:54:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:04,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:04,428 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:04,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 23:54:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:04,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:54:04,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:04,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:04,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070619817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:04,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:04,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-25 23:54:04,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216857530] [2022-11-25 23:54:04,819 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:04,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:54:04,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:54:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:54:04,820 INFO L87 Difference]: Start difference. First operand 269 states and 356 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2022-11-25 23:54:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:05,359 INFO L93 Difference]: Finished difference Result 386 states and 473 transitions. [2022-11-25 23:54:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:54:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 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 [2022-11-25 23:54:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:05,361 INFO L225 Difference]: With dead ends: 386 [2022-11-25 23:54:05,361 INFO L226 Difference]: Without dead ends: 386 [2022-11-25 23:54:05,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:54:05,362 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:05,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 277 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:54:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-25 23:54:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 341. [2022-11-25 23:54:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 300 states have (on average 1.35) internal successors, (405), 324 states have internal predecessors, (405), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-11-25 23:54:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 438 transitions. [2022-11-25 23:54:05,372 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 438 transitions. Word has length 28 [2022-11-25 23:54:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:05,373 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 438 transitions. [2022-11-25 23:54:05,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2022-11-25 23:54:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 438 transitions. [2022-11-25 23:54:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:54:05,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:05,374 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] [2022-11-25 23:54:05,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:05,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-25 23:54:05,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-25 23:54:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:05,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:54:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-11-25 23:54:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:05,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494382310] [2022-11-25 23:54:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:05,979 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 [2022-11-25 23:54:05,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:05,980 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:54:06,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:54:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:54:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:06,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:06,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494382310] [2022-11-25 23:54:06,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494382310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227462164] [2022-11-25 23:54:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:06,596 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:06,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-25 23:54:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:06,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:54:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:07,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:07,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227462164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:07,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:54:07,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 13 [2022-11-25 23:54:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052574610] [2022-11-25 23:54:07,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:54:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:54:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:54:07,062 INFO L87 Difference]: Start difference. First operand 341 states and 438 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-11-25 23:54:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:07,333 INFO L93 Difference]: Finished difference Result 416 states and 519 transitions. [2022-11-25 23:54:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:54:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 [2022-11-25 23:54:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:07,336 INFO L225 Difference]: With dead ends: 416 [2022-11-25 23:54:07,336 INFO L226 Difference]: Without dead ends: 416 [2022-11-25 23:54:07,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:54:07,337 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:07,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 194 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:54:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-25 23:54:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 354. [2022-11-25 23:54:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 313 states have (on average 1.3354632587859425) internal successors, (418), 337 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-11-25 23:54:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 451 transitions. [2022-11-25 23:54:07,348 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 451 transitions. Word has length 29 [2022-11-25 23:54:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:07,349 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 451 transitions. [2022-11-25 23:54:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-11-25 23:54:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 451 transitions. [2022-11-25 23:54:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:54:07,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:07,350 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] [2022-11-25 23:54:07,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-25 23:54:07,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:54:07,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:07,753 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:54:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:07,753 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-11-25 23:54:07,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345541923] [2022-11-25 23:54:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:07,754 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 [2022-11-25 23:54:07,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:07,755 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:54:07,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:54:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:54:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:10,464 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 [2022-11-25 23:54:10,617 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 [2022-11-25 23:54:10,622 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 [2022-11-25 23:54:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:10,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:13,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:13,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345541923] [2022-11-25 23:54:13,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345541923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:13,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1336433465] [2022-11-25 23:54:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:13,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:13,046 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:13,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-25 23:54:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:54:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:17,852 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 [2022-11-25 23:54:17,942 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 [2022-11-25 23:54:17,946 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 [2022-11-25 23:54:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:17,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:20,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1336433465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:20,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500356342] [2022-11-25 23:54:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:20,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:20,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:20,220 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:20,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 23:54:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:54:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:22,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:22,826 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 [2022-11-25 23:54:22,914 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 [2022-11-25 23:54:22,919 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 [2022-11-25 23:54:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:22,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:25,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500356342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:25,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:54:25,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-25 23:54:25,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462529721] [2022-11-25 23:54:25,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:25,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:54:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:54:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-25 23:54:25,163 INFO L87 Difference]: Start difference. First operand 354 states and 451 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) [2022-11-25 23:54:31,956 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] [2022-11-25 23:54:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:58,789 INFO L93 Difference]: Finished difference Result 415 states and 513 transitions. [2022-11-25 23:54:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:54:58,791 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 [2022-11-25 23:54:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:58,793 INFO L225 Difference]: With dead ends: 415 [2022-11-25 23:54:58,793 INFO L226 Difference]: Without dead ends: 415 [2022-11-25 23:54:58,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=197, Invalid=486, Unknown=19, NotChecked=0, Total=702 [2022-11-25 23:54:58,794 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 198 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 28 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:58,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 166 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 173 Invalid, 17 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 23:54:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-25 23:54:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 354. [2022-11-25 23:54:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 313 states have (on average 1.3194888178913737) internal successors, (413), 337 states have internal predecessors, (413), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-11-25 23:54:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 446 transitions. [2022-11-25 23:54:58,806 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 446 transitions. Word has length 29 [2022-11-25 23:54:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:58,806 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 446 transitions. [2022-11-25 23:54:58,807 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) [2022-11-25 23:54:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 446 transitions. [2022-11-25 23:54:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 23:54:58,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:58,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:58,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:59,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:59,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-25 23:54:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:59,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:54:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-11-25 23:54:59,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:59,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059470423] [2022-11-25 23:54:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:59,424 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 [2022-11-25 23:54:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:59,425 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:54:59,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-25 23:54:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:54:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:54:59,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:00,139 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:00,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059470423] [2022-11-25 23:55:00,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059470423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:00,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [17631429] [2022-11-25 23:55:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:00,140 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:00,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:00,148 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:00,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-25 23:55:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:55:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:00,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:00,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [17631429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372039309] [2022-11-25 23:55:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:00,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:00,768 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:00,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 23:55:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:55:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:01,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:01,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372039309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:01,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:01,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-25 23:55:01,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892808123] [2022-11-25 23:55:01,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:55:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:55:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:55:01,224 INFO L87 Difference]: Start difference. First operand 354 states and 446 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 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) [2022-11-25 23:55:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:01,944 INFO L93 Difference]: Finished difference Result 381 states and 457 transitions. [2022-11-25 23:55:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:55:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 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 31 [2022-11-25 23:55:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:01,947 INFO L225 Difference]: With dead ends: 381 [2022-11-25 23:55:01,947 INFO L226 Difference]: Without dead ends: 381 [2022-11-25 23:55:01,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:55:01,948 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 362 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:01,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 283 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:55:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-25 23:55:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 364. [2022-11-25 23:55:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.3012422360248448) internal successors, (419), 347 states have internal predecessors, (419), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-11-25 23:55:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 452 transitions. [2022-11-25 23:55:01,957 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 452 transitions. Word has length 31 [2022-11-25 23:55:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:01,957 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 452 transitions. [2022-11-25 23:55:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 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) [2022-11-25 23:55:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 452 transitions. [2022-11-25 23:55:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:55:01,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:01,958 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] [2022-11-25 23:55:01,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:02,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:02,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-25 23:55:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:02,570 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-11-25 23:55:02,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:02,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604511396] [2022-11-25 23:55:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:02,570 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 [2022-11-25 23:55:02,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:02,571 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:02,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-25 23:55:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:02,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:02,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604511396] [2022-11-25 23:55:02,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604511396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:02,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194048603] [2022-11-25 23:55:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:02,883 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:02,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:02,884 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:02,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-25 23:55:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:02,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:02,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:03,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:03,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [194048603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529090513] [2022-11-25 23:55:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:03,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:03,199 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:03,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 23:55:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:03,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:03,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:03,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529090513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:03,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-25 23:55:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216292403] [2022-11-25 23:55:03,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:55:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:55:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:55:03,483 INFO L87 Difference]: Start difference. First operand 364 states and 452 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) [2022-11-25 23:55:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:03,534 INFO L93 Difference]: Finished difference Result 365 states and 451 transitions. [2022-11-25 23:55:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:55:03,535 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 [2022-11-25 23:55:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:03,536 INFO L225 Difference]: With dead ends: 365 [2022-11-25 23:55:03,536 INFO L226 Difference]: Without dead ends: 365 [2022-11-25 23:55:03,537 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 [2022-11-25 23:55:03,537 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:03,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 107 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:55:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-25 23:55:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2022-11-25 23:55:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 322 states have (on average 1.2888198757763976) internal successors, (415), 345 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-11-25 23:55:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 448 transitions. [2022-11-25 23:55:03,548 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 448 transitions. Word has length 40 [2022-11-25 23:55:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:03,549 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 448 transitions. [2022-11-25 23:55:03,549 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) [2022-11-25 23:55:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 448 transitions. [2022-11-25 23:55:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:55:03,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:03,550 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] [2022-11-25 23:55:03,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:03,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:03,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-25 23:55:04,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:04,163 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2022-11-25 23:55:04,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:04,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459859499] [2022-11-25 23:55:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:04,164 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 [2022-11-25 23:55:04,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:04,165 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:04,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-25 23:55:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:55:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:55:06,806 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 [2022-11-25 23:55:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:07,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:08,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:08,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459859499] [2022-11-25 23:55:08,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459859499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:08,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80225765] [2022-11-25 23:55:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:08,227 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:08,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:08,228 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:08,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-25 23:55:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:55:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:10,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:55:10,893 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 [2022-11-25 23:55:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:11,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:11,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80225765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650860130] [2022-11-25 23:55:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:11,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:11,798 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:11,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 23:55:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:55:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:14,264 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:55:14,264 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 [2022-11-25 23:55:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:55:14,812 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 [2022-11-25 23:55:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:15,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:15,562 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:55:15,562 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 [2022-11-25 23:55:18,368 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:55:18,368 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 [2022-11-25 23:55:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:20,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650860130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:20,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-25 23:55:20,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-11-25 23:55:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506514757] [2022-11-25 23:55:20,556 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:20,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:55:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:55:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=203, Unknown=10, NotChecked=0, Total=272 [2022-11-25 23:55:20,558 INFO L87 Difference]: Start difference. First operand 362 states and 448 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) [2022-11-25 23:55:25,781 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] [2022-11-25 23:55:33,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:55:38,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:55:40,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:55:46,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:55:48,394 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] [2022-11-25 23:55:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:48,880 INFO L93 Difference]: Finished difference Result 435 states and 520 transitions. [2022-11-25 23:55:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:55:48,884 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 [2022-11-25 23:55:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:48,886 INFO L225 Difference]: With dead ends: 435 [2022-11-25 23:55:48,887 INFO L226 Difference]: Without dead ends: 435 [2022-11-25 23:55:48,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=241, Invalid=613, Unknown=16, NotChecked=0, Total=870 [2022-11-25 23:55:48,889 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 470 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 81 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:48,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 190 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 234 Invalid, 49 Unknown, 0 Unchecked, 13.2s Time] [2022-11-25 23:55:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-25 23:55:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 360. [2022-11-25 23:55:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 322 states have (on average 1.2577639751552796) internal successors, (405), 343 states have internal predecessors, (405), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-11-25 23:55:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 438 transitions. [2022-11-25 23:55:48,902 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 438 transitions. Word has length 41 [2022-11-25 23:55:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:48,902 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 438 transitions. [2022-11-25 23:55:48,902 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) [2022-11-25 23:55:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 438 transitions. [2022-11-25 23:55:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:55:48,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:48,904 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] [2022-11-25 23:55:48,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:49,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:49,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-25 23:55:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:49,508 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:49,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-11-25 23:55:49,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:49,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269354151] [2022-11-25 23:55:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:49,509 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 [2022-11-25 23:55:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:49,510 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:49,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-25 23:55:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:49,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:55:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:49,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:50,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:50,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269354151] [2022-11-25 23:55:50,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269354151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:50,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692903203] [2022-11-25 23:55:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:50,255 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:50,256 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:50,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-25 23:55:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:50,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:50,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1692903203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:50,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923878481] [2022-11-25 23:55:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:50,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:50,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:50,663 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:50,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 23:55:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:50,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:51,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923878481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:51,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:51,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-25 23:55:51,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568423140] [2022-11-25 23:55:51,045 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:51,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:55:51,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:51,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:55:51,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:55:51,047 INFO L87 Difference]: Start difference. First operand 360 states and 438 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) [2022-11-25 23:55:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:51,338 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2022-11-25 23:55:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:55:51,339 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 [2022-11-25 23:55:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:51,341 INFO L225 Difference]: With dead ends: 320 [2022-11-25 23:55:51,341 INFO L226 Difference]: Without dead ends: 320 [2022-11-25 23:55:51,341 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 [2022-11-25 23:55:51,341 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 108 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:51,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 156 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-25 23:55:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2022-11-25 23:55:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 268 states have (on average 1.25) internal successors, (335), 283 states have internal predecessors, (335), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 23:55:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 358 transitions. [2022-11-25 23:55:51,349 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 358 transitions. Word has length 41 [2022-11-25 23:55:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:51,349 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 358 transitions. [2022-11-25 23:55:51,349 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) [2022-11-25 23:55:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 358 transitions. [2022-11-25 23:55:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:55:51,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:51,350 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] [2022-11-25 23:55:51,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:51,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-25 23:55:51,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:51,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:51,962 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-11-25 23:55:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:51,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111013983] [2022-11-25 23:55:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:51,963 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 [2022-11-25 23:55:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:51,964 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:51,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-25 23:55:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:55:52,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:52,113 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 [2022-11-25 23:55:52,254 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:55:52,254 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 [2022-11-25 23:55:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:52,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:52,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111013983] [2022-11-25 23:55:52,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111013983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771139211] [2022-11-25 23:55:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:52,476 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:52,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-25 23:55:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:55:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:52,738 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 [2022-11-25 23:55:52,852 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:55:52,853 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 [2022-11-25 23:55:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:52,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:53,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1771139211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:53,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206274723] [2022-11-25 23:55:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:53,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:53,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:53,060 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:53,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 23:55:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:55:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:53,160 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 [2022-11-25 23:55:53,273 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:55:53,273 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 [2022-11-25 23:55:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:53,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206274723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:53,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:53,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-25 23:55:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272566805] [2022-11-25 23:55:53,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:53,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:55:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:55:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:55:53,483 INFO L87 Difference]: Start difference. First operand 298 states and 358 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) [2022-11-25 23:55:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:53,705 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2022-11-25 23:55:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:55:53,705 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 [2022-11-25 23:55:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:53,707 INFO L225 Difference]: With dead ends: 320 [2022-11-25 23:55:53,707 INFO L226 Difference]: Without dead ends: 320 [2022-11-25 23:55:53,707 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 [2022-11-25 23:55:53,708 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:53,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-25 23:55:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 306. [2022-11-25 23:55:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 276 states have (on average 1.2427536231884058) internal successors, (343), 291 states have internal predecessors, (343), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 23:55:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 366 transitions. [2022-11-25 23:55:53,716 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 366 transitions. Word has length 42 [2022-11-25 23:55:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:53,716 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 366 transitions. [2022-11-25 23:55:53,716 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) [2022-11-25 23:55:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 366 transitions. [2022-11-25 23:55:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:55:53,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:53,717 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] [2022-11-25 23:55:53,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:53,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:54,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:54,330 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-11-25 23:55:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:54,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071153287] [2022-11-25 23:55:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:54,331 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 [2022-11-25 23:55:54,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:54,333 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:54,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:55:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:55:54,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:55:54,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:54,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071153287] [2022-11-25 23:55:54,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071153287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:54,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:54,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:55:54,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510411904] [2022-11-25 23:55:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:54,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:55:54,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:54,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:55:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:55:54,457 INFO L87 Difference]: Start difference. First operand 306 states and 366 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) [2022-11-25 23:55:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:54,462 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-11-25 23:55:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:55:54,463 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 [2022-11-25 23:55:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:54,464 INFO L225 Difference]: With dead ends: 258 [2022-11-25 23:55:54,464 INFO L226 Difference]: Without dead ends: 258 [2022-11-25 23:55:54,464 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 [2022-11-25 23:55:54,465 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 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 [2022-11-25 23:55:54,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:55:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-25 23:55:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2022-11-25 23:55:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 223 states have (on average 1.1838565022421526) internal successors, (264), 232 states have internal predecessors, (264), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-25 23:55:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 281 transitions. [2022-11-25 23:55:54,471 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 281 transitions. Word has length 47 [2022-11-25 23:55:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:54,471 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 281 transitions. [2022-11-25 23:55:54,472 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) [2022-11-25 23:55:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 281 transitions. [2022-11-25 23:55:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 23:55:54,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:54,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:54,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:54,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:55:54,681 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-11-25 23:55:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:54,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119395935] [2022-11-25 23:55:54,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:54,682 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 [2022-11-25 23:55:54,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:54,683 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:54,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:55:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:54,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:55:54,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:55:55,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:55:55,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119395935] [2022-11-25 23:55:55,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119395935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [582028397] [2022-11-25 23:55:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:55,507 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:55,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-25 23:55:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:55,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:55:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:55:56,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:55:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [582028397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953049571] [2022-11-25 23:55:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:56,383 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:56,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-25 23:55:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:56,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:55:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:55:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:55:57,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953049571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:57,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:57,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-25 23:55:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385926273] [2022-11-25 23:55:57,068 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:57,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:55:57,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:55:57,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:55:57,069 INFO L87 Difference]: Start difference. First operand 245 states and 281 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:55:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:57,753 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-11-25 23:55:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:55:57,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-11-25 23:55:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:57,755 INFO L225 Difference]: With dead ends: 261 [2022-11-25 23:55:57,755 INFO L226 Difference]: Without dead ends: 261 [2022-11-25 23:55:57,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:55:57,755 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 251 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:57,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 257 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:55:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-25 23:55:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 245. [2022-11-25 23:55:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 223 states have (on average 1.1748878923766817) internal successors, (262), 232 states have internal predecessors, (262), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-25 23:55:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 279 transitions. [2022-11-25 23:55:57,761 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 279 transitions. Word has length 51 [2022-11-25 23:55:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:57,762 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 279 transitions. [2022-11-25 23:55:57,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:55:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 279 transitions. [2022-11-25 23:55:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 23:55:57,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:57,763 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] [2022-11-25 23:55:57,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:57,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:55:58,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-25 23:55:58,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:58,367 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:55:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:58,367 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-11-25 23:55:58,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:55:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935411279] [2022-11-25 23:55:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:58,368 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 [2022-11-25 23:55:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:55:58,369 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:55:58,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:55:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:58,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:55:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:58,743 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:55:58,743 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 [2022-11-25 23:56:01,414 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-25 23:56:01,415 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 [2022-11-25 23:56:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:01,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:01,622 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:56:01,622 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 [2022-11-25 23:56:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:04,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935411279] [2022-11-25 23:56:04,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935411279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993024213] [2022-11-25 23:56:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:04,802 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:04,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-25 23:56:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:56:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:05,380 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-25 23:56:05,380 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 [2022-11-25 23:56:05,739 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:05,740 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 [2022-11-25 23:56:05,840 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:56:05,840 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 [2022-11-25 23:56:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:06,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:06,132 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:56:06,132 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 [2022-11-25 23:56:10,698 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:56:10,698 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 [2022-11-25 23:56:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1993024213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748742179] [2022-11-25 23:56:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:11,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:11,079 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:11,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 23:56:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:56:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:11,235 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:56:11,235 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 [2022-11-25 23:56:11,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:11,558 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 [2022-11-25 23:56:11,627 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:56:11,627 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 [2022-11-25 23:56:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:11,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:11,833 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:56:11,833 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 [2022-11-25 23:56:18,930 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 23:56:18,931 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 [2022-11-25 23:56:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:19,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748742179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:19,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:56:19,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10, 7, 8] total 29 [2022-11-25 23:56:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545284943] [2022-11-25 23:56:19,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 23:56:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 23:56:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=705, Unknown=4, NotChecked=0, Total=870 [2022-11-25 23:56:19,104 INFO L87 Difference]: Start difference. First operand 245 states and 279 transitions. Second operand has 30 states, 27 states have (on average 6.518518518518518) internal successors, (176), 28 states have internal predecessors, (176), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:56:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:32,172 INFO L93 Difference]: Finished difference Result 247 states and 281 transitions. [2022-11-25 23:56:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:56:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 6.518518518518518) internal successors, (176), 28 states have internal predecessors, (176), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2022-11-25 23:56:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:32,173 INFO L225 Difference]: With dead ends: 247 [2022-11-25 23:56:32,174 INFO L226 Difference]: Without dead ends: 247 [2022-11-25 23:56:32,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 265 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=336, Invalid=991, Unknown=5, NotChecked=0, Total=1332 [2022-11-25 23:56:32,175 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 319 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:32,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 128 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:56:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-25 23:56:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-11-25 23:56:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 223 states have (on average 1.1704035874439462) internal successors, (261), 231 states have internal predecessors, (261), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-25 23:56:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2022-11-25 23:56:32,181 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 51 [2022-11-25 23:56:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:32,181 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2022-11-25 23:56:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 6.518518518518518) internal successors, (176), 28 states have internal predecessors, (176), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 23:56:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2022-11-25 23:56:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 23:56:32,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:32,183 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:32,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:56:32,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:32,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-25 23:56:32,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:32,796 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:56:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-11-25 23:56:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:32,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311414384] [2022-11-25 23:56:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:32,797 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 [2022-11-25 23:56:32,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:32,797 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:56:32,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-25 23:56:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:32,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:56:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:56:33,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:56:33,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311414384] [2022-11-25 23:56:33,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311414384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1390073760] [2022-11-25 23:56:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:33,702 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:33,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-25 23:56:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:33,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:56:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:56:34,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:56:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1390073760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:34,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737425331] [2022-11-25 23:56:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:34,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:34,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:34,630 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:34,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-25 23:56:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:56:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:56:34,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:56:35,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737425331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:35,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:56:35,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-25 23:56:35,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029315570] [2022-11-25 23:56:35,378 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:35,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:56:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:35,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:56:35,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:56:35,379 INFO L87 Difference]: Start difference. First operand 244 states and 278 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:56:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:36,029 INFO L93 Difference]: Finished difference Result 252 states and 283 transitions. [2022-11-25 23:56:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:56:36,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-11-25 23:56:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:36,031 INFO L225 Difference]: With dead ends: 252 [2022-11-25 23:56:36,031 INFO L226 Difference]: Without dead ends: 252 [2022-11-25 23:56:36,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:56:36,032 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 229 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:36,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 208 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:56:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-25 23:56:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2022-11-25 23:56:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 223 states have (on average 1.15695067264574) internal successors, (258), 230 states have internal predecessors, (258), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-25 23:56:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 275 transitions. [2022-11-25 23:56:36,038 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 275 transitions. Word has length 52 [2022-11-25 23:56:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:36,039 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 275 transitions. [2022-11-25 23:56:36,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:56:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 275 transitions. [2022-11-25 23:56:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 23:56:36,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:36,040 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] [2022-11-25 23:56:36,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-25 23:56:36,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-25 23:56:36,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:36,643 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:56:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-11-25 23:56:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690808164] [2022-11-25 23:56:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:36,645 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 [2022-11-25 23:56:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:36,646 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:56:36,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-25 23:56:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:36,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:56:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:37,247 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:56:37,247 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 [2022-11-25 23:56:40,325 INFO L321 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-11-25 23:56:40,325 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 [2022-11-25 23:56:40,481 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 [2022-11-25 23:56:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:40,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:40,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690808164] [2022-11-25 23:56:40,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690808164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:56:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894670844] [2022-11-25 23:56:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:40,986 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:40,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:40,987 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:40,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-25 23:56:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:56:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:41,877 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:56:41,878 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 [2022-11-25 23:56:44,760 INFO L321 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2022-11-25 23:56:44,760 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 [2022-11-25 23:56:44,992 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 [2022-11-25 23:56:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:45,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894670844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:56:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838641806] [2022-11-25 23:56:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:45,368 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:45,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-25 23:56:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:56:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:45,940 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:56:45,940 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 [2022-11-25 23:56:46,663 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-25 23:56:46,664 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 [2022-11-25 23:56:46,786 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:56:46,787 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 [2022-11-25 23:56:47,039 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 [2022-11-25 23:56:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:47,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:47,238 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-25 23:56:47,239 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 196 treesize of output 183 [2022-11-25 23:56:50,039 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-25 23:56:50,040 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 94 treesize of output 115 [2022-11-25 23:56:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:51,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838641806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:51,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-25 23:56:51,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2022-11-25 23:56:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998663765] [2022-11-25 23:56:51,164 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:51,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 23:56:51,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:56:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 23:56:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1499, Unknown=4, NotChecked=0, Total=1722 [2022-11-25 23:56:51,167 INFO L87 Difference]: Start difference. First operand 243 states and 275 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) [2022-11-25 23:57:19,818 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 48 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:25,968 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2022-11-25 23:57:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:57:25,969 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 [2022-11-25 23:57:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:25,970 INFO L225 Difference]: With dead ends: 283 [2022-11-25 23:57:25,970 INFO L226 Difference]: Without dead ends: 283 [2022-11-25 23:57:25,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=666, Invalid=2633, Unknown=7, NotChecked=0, Total=3306 [2022-11-25 23:57:25,971 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 525 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:25,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 281 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:57:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-25 23:57:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 243. [2022-11-25 23:57:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 223 states have (on average 1.1524663677130045) internal successors, (257), 230 states have internal predecessors, (257), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-25 23:57:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2022-11-25 23:57:25,977 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 52 [2022-11-25 23:57:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:25,978 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2022-11-25 23:57:25,978 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) [2022-11-25 23:57:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2022-11-25 23:57:25,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:57:25,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:25,979 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] [2022-11-25 23:57:25,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:26,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-25 23:57:26,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-25 23:57:26,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:57:26,586 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:57:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-11-25 23:57:26,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:57:26,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47499523] [2022-11-25 23:57:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:57:26,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:57:26,588 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:57:26,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-25 23:57:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:57:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:26,979 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:57:26,979 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 [2022-11-25 23:57:27,269 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_191 (_ BitVec 1)) (v_ArrVal_190 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_191) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-25 23:57:27,385 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:57:27,385 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 [2022-11-25 23:57:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 23:57:27,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:27,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:57:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47499523] [2022-11-25 23:57:27,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47499523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699213017] [2022-11-25 23:57:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:57:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:57:27,804 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:57:27,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-25 23:57:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:28,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:57:28,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:28,566 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:57:28,566 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 [2022-11-25 23:57:30,871 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_205 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_205))) is different from true [2022-11-25 23:57:30,974 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-25 23:57:30,974 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 [2022-11-25 23:57:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 23:57:31,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1699213017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460866813] [2022-11-25 23:57:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:31,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:31,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:31,383 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:31,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-25 23:57:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:57:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:31,742 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:57:31,742 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 [2022-11-25 23:57:32,023 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_190 (_ BitVec 1)) (v_ArrVal_217 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_217) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-11-25 23:57:32,135 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-25 23:57:32,135 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 [2022-11-25 23:57:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 23:57:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:34,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460866813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:34,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:57:34,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-25 23:57:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789401638] [2022-11-25 23:57:34,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:57:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:57:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:57:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=433, Unknown=4, NotChecked=132, Total=650 [2022-11-25 23:57:34,339 INFO L87 Difference]: Start difference. First operand 243 states and 274 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) [2022-11-25 23:58:22,513 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_205 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_205))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_191 (_ BitVec 1)) (v_ArrVal_190 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_191) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_190 (_ BitVec 1)) (v_ArrVal_217 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_217) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|))))) is different from true [2022-11-25 23:58:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:58:22,715 INFO L93 Difference]: Finished difference Result 272 states and 298 transitions. [2022-11-25 23:58:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:58:22,716 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 [2022-11-25 23:58:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:58:22,717 INFO L225 Difference]: With dead ends: 272 [2022-11-25 23:58:22,717 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 23:58:22,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=406, Invalid=1476, Unknown=26, NotChecked=348, Total=2256 [2022-11-25 23:58:22,718 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 343 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:58:22,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 595 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 706 Invalid, 0 Unknown, 462 Unchecked, 1.9s Time] [2022-11-25 23:58:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 23:58:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-11-25 23:58:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 241 states have internal predecessors, (268), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 23:58:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2022-11-25 23:58:22,724 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 54 [2022-11-25 23:58:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:58:22,724 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2022-11-25 23:58:22,725 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) [2022-11-25 23:58:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2022-11-25 23:58:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 23:58:22,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:58:22,726 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] [2022-11-25 23:58:22,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-25 23:58:22,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-25 23:58:23,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-25 23:58:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:58:23,327 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:58:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:58:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2022-11-25 23:58:23,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:58:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859421507] [2022-11-25 23:58:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:23,328 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 [2022-11-25 23:58:23,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:58:23,329 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:58:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:58:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:23,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:58:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:24,107 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:24,107 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 [2022-11-25 23:58:27,204 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:58:27,204 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 [2022-11-25 23:58:27,516 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 [2022-11-25 23:58:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:58:27,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:28,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:58:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859421507] [2022-11-25 23:58:28,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859421507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1342871017] [2022-11-25 23:58:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:28,200 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:58:28,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:58:28,202 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:58:28,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-25 23:58:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:58:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:33,350 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-25 23:58:33,350 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 [2022-11-25 23:58:40,538 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-25 23:58:40,539 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 [2022-11-25 23:58:41,043 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 [2022-11-25 23:58:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:58:41,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:41,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1342871017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761385882] [2022-11-25 23:58:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:58:41,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:58:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:58:41,491 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:58:41,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-25 23:58:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:58:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:58:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:58:44,047 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:58:44,047 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 [2022-11-25 23:58:50,813 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-25 23:58:50,814 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 [2022-11-25 23:58:51,016 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 [2022-11-25 23:58:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:58:51,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:55,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761385882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:58:55,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:58:55,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-25 23:58:55,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464596981] [2022-11-25 23:58:55,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:55,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:58:55,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:58:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:58:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=737, Unknown=17, NotChecked=0, Total=870 [2022-11-25 23:58:55,531 INFO L87 Difference]: Start difference. First operand 254 states and 283 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) [2022-11-25 23:59:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:43,233 INFO L93 Difference]: Finished difference Result 330 states and 356 transitions. [2022-11-25 23:59:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:59:43,234 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 [2022-11-25 23:59:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:43,236 INFO L225 Difference]: With dead ends: 330 [2022-11-25 23:59:43,236 INFO L226 Difference]: Without dead ends: 330 [2022-11-25 23:59:43,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 71.9s TimeCoverageRelationStatistics Valid=561, Invalid=2371, Unknown=38, NotChecked=0, Total=2970 [2022-11-25 23:59:43,238 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 399 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 59 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:43,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 486 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1013 Invalid, 36 Unknown, 0 Unchecked, 3.0s Time] [2022-11-25 23:59:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-25 23:59:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 253. [2022-11-25 23:59:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 235 states have (on average 1.1361702127659574) internal successors, (267), 240 states have internal predecessors, (267), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 23:59:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 282 transitions. [2022-11-25 23:59:43,245 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 282 transitions. Word has length 60 [2022-11-25 23:59:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:43,246 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 282 transitions. [2022-11-25 23:59:43,246 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) [2022-11-25 23:59:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 282 transitions. [2022-11-25 23:59:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 23:59:43,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:43,247 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] [2022-11-25 23:59:43,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:43,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:43,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:59:43,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:59:43,855 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-25 23:59:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2022-11-25 23:59:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:59:43,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724754244] [2022-11-25 23:59:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:43,856 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 [2022-11-25 23:59:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:59:43,857 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:59:43,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:59:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:44,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:59:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:44,664 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:59:44,664 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 [2022-11-25 23:59:45,323 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 [2022-11-25 23:59:45,547 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:59:45,547 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 [2022-11-25 23:59:46,838 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 [2022-11-25 23:59:46,844 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 [2022-11-25 23:59:47,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:59:47,046 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 [2022-11-25 23:59:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:47,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:48,021 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 [2022-11-25 23:59:48,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:59:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724754244] [2022-11-25 23:59:48,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724754244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1917224350] [2022-11-25 23:59:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:48,163 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:59:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:59:48,168 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:59:48,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-25 23:59:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:48,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:59:48,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:49,834 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:59:49,835 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 [2022-11-25 23:59:49,885 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 23:59:49,885 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 [2022-11-25 23:59:54,927 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 [2022-11-25 23:59:55,295 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:59:55,296 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 [2022-11-25 23:59:55,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:59:55,321 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 [2022-11-25 23:59:56,342 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 [2022-11-25 23:59:56,351 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 [2022-11-25 23:59:56,533 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 23:59:56,533 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 [2022-11-25 23:59:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:59:56,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:56,993 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 [2022-11-25 23:59:59,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1917224350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083460956] [2022-11-25 23:59:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:59,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:59,192 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:59,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-25 23:59:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:59,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:59:59,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:59,820 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 23:59:59,821 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 [2022-11-26 00:00:00,344 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 [2022-11-26 00:00:00,509 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:00:00,510 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 [2022-11-26 00:00:01,406 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 [2022-11-26 00:00:01,412 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 [2022-11-26 00:00:01,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:00:01,485 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 [2022-11-26 00:00:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:01,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:00:01,843 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 [2022-11-26 00:00:01,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083460956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:00:01,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:00:01,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-26 00:00:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127490038] [2022-11-26 00:00:01,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:00:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-26 00:00:01,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:00:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-26 00:00:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1018, Unknown=52, NotChecked=0, Total=1190 [2022-11-26 00:00:01,956 INFO L87 Difference]: Start difference. First operand 253 states and 282 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) [2022-11-26 00:00:12,102 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] [2022-11-26 00:00:14,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:16,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:18,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:20,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:22,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:29,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:31,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:33,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:35,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:37,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:43,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:45,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:47,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:49,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:51,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:53,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:00:55,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:01:00,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:01:02,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:01:06,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:01:18,834 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 54 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:01:20,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:01:33,075 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 56 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:01:35,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:02:01,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:02:07,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:02:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:15,875 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2022-11-26 00:02:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:02:15,876 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 61 [2022-11-26 00:02:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:15,878 INFO L225 Difference]: With dead ends: 292 [2022-11-26 00:02:15,878 INFO L226 Difference]: Without dead ends: 292 [2022-11-26 00:02:15,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 89.3s TimeCoverageRelationStatistics Valid=661, Invalid=3036, Unknown=85, NotChecked=0, Total=3782 [2022-11-26 00:02:15,879 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 452 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 74 mSolverCounterUnsat, 77 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 77 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:15,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 530 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1018 Invalid, 77 Unknown, 0 Unchecked, 54.5s Time] [2022-11-26 00:02:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-26 00:02:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 252. [2022-11-26 00:02:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 235 states have (on average 1.1319148936170214) internal successors, (266), 239 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-26 00:02:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2022-11-26 00:02:15,885 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 61 [2022-11-26 00:02:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:15,886 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2022-11-26 00:02:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-26 00:02:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2022-11-26 00:02:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:02:15,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:15,887 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-11-26 00:02:15,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:16,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-26 00:02:16,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:16,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:02:16,492 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-26 00:02:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash 586619876, now seen corresponding path program 1 times [2022-11-26 00:02:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:02:16,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032667902] [2022-11-26 00:02:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:16,493 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 [2022-11-26 00:02:16,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:02:16,494 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:02:16,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-26 00:02:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:02:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:16,684 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 [2022-11-26 00:02:17,084 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:17,084 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 22 treesize of output 27 [2022-11-26 00:02:17,159 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:02:17,159 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 [2022-11-26 00:02:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:17,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:17,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:02:17,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032667902] [2022-11-26 00:02:17,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032667902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537480213] [2022-11-26 00:02:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:17,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:02:17,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:02:17,821 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:02:17,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-26 00:02:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:02:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:18,323 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 [2022-11-26 00:02:18,640 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:18,641 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 22 treesize of output 27 [2022-11-26 00:02:18,717 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:02:18,717 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 [2022-11-26 00:02:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:18,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:19,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1537480213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:19,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685927635] [2022-11-26 00:02:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:19,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:02:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:02:19,313 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:02:19,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-26 00:02:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:19,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:02:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:19,445 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 [2022-11-26 00:02:19,748 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:19,748 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 22 treesize of output 27 [2022-11-26 00:02:19,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:02:19,847 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 [2022-11-26 00:02:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:02:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:02:20,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685927635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:02:20,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:02:20,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 10 [2022-11-26 00:02:20,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297975141] [2022-11-26 00:02:20,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:02:20,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:02:20,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:02:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:02:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:02:20,420 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:02:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:21,103 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2022-11-26 00:02:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:02:21,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-11-26 00:02:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:21,105 INFO L225 Difference]: With dead ends: 263 [2022-11-26 00:02:21,105 INFO L226 Difference]: Without dead ends: 263 [2022-11-26 00:02:21,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 367 SyntacticMatches, 15 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:02:21,106 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:21,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 180 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:02:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-26 00:02:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 207. [2022-11-26 00:02:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 196 states have internal predecessors, (219), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:02:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2022-11-26 00:02:21,111 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 66 [2022-11-26 00:02:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:21,112 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2022-11-26 00:02:21,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:02:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2022-11-26 00:02:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:02:21,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:21,113 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:21,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:21,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-26 00:02:21,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-26 00:02:21,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:02:21,720 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-26 00:02:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2022-11-26 00:02:21,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:02:21,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273457403] [2022-11-26 00:02:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:21,721 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 [2022-11-26 00:02:21,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:02:21,722 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:02:21,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-26 00:02:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:02:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:02:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:02:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-26 00:02:22,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:02:22,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:02:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273457403] [2022-11-26 00:02:22,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273457403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:02:22,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:02:22,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:02:22,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475405556] [2022-11-26 00:02:22,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:02:22,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:02:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:02:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:02:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:02:22,083 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:02:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:02:22,178 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2022-11-26 00:02:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:02:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-11-26 00:02:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:02:22,180 INFO L225 Difference]: With dead ends: 218 [2022-11-26 00:02:22,180 INFO L226 Difference]: Without dead ends: 209 [2022-11-26 00:02:22,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:02:22,181 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:02:22,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:02:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-26 00:02:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 200. [2022-11-26 00:02:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 187 states have (on average 1.1176470588235294) internal successors, (209), 189 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:02:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-11-26 00:02:22,186 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 67 [2022-11-26 00:02:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:02:22,187 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-11-26 00:02:22,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:02:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-11-26 00:02:22,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:02:22,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:02:22,188 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, 1, 1] [2022-11-26 00:02:22,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:02:22,401 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-26 00:02:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:02:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 272552823, now seen corresponding path program 1 times [2022-11-26 00:02:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:02:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152616006] [2022-11-26 00:02:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:02:22,402 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 [2022-11-26 00:02:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:02:22,403 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 00:02:22,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-26 00:02:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:02:22,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:02:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:02:22,748 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-26 00:02:22,749 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:02:22,750 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-26 00:02:22,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-26 00:02:22,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-26 00:02:22,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-26 00:02:22,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-26 00:02:22,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-26 00:02:22,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-26 00:02:22,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-26 00:02:22,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-26 00:02:22,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-26 00:02:22,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-26 00:02:22,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-26 00:02:22,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-26 00:02:22,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-26 00:02:22,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-26 00:02:22,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-26 00:02:22,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-26 00:02:22,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-26 00:02:22,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-26 00:02:22,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-26 00:02:22,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-26 00:02:22,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:02:22,971 INFO L445 BasicCegarLoop]: Path program histogram: [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, 1, 1, 1, 1, 1, 1] [2022-11-26 00:02:22,974 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:02:23,013 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Expected only CPrimitive but got *CHAR at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:360) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator.translateBitvecLiteral(CACSL2BoogieBacktranslator.java:1212) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator.translateExpression(CACSL2BoogieBacktranslator.java:1021) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator.translateProgramStateEntry(CACSL2BoogieBacktranslator.java:658) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator.translateProgramState(CACSL2BoogieBacktranslator.java:633) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator.handleCASTFunctionCallExpression(CACSL2BoogieBacktranslator.java:490) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator.translateProgramExecution(CACSL2BoogieBacktranslator.java:267) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:217) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:582) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:02:23,016 INFO L158 Benchmark]: Toolchain (without parser) took 594179.01ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 58.8MB in the beginning and 38.5MB in the end (delta: 20.3MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. [2022-11-26 00:02:23,016 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 58.7MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 98.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:02:23,016 INFO L158 Benchmark]: CACSL2BoogieTranslator took 663.27ms. Allocated memory is still 81.8MB. Free memory was 58.6MB in the beginning and 56.0MB in the end (delta: 2.6MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2022-11-26 00:02:23,016 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.52ms. Allocated memory is still 81.8MB. Free memory was 56.0MB in the beginning and 53.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:02:23,017 INFO L158 Benchmark]: Boogie Preprocessor took 66.82ms. Allocated memory is still 81.8MB. Free memory was 53.7MB in the beginning and 51.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:02:23,017 INFO L158 Benchmark]: RCFGBuilder took 666.77ms. Allocated memory is still 81.8MB. Free memory was 51.9MB in the beginning and 33.5MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-26 00:02:23,017 INFO L158 Benchmark]: TraceAbstraction took 592706.04ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 32.7MB in the beginning and 38.5MB in the end (delta: -5.9MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2022-11-26 00:02:23,018 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 58.7MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 98.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 663.27ms. Allocated memory is still 81.8MB. Free memory was 58.6MB in the beginning and 56.0MB in the end (delta: 2.6MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.52ms. Allocated memory is still 81.8MB. Free memory was 56.0MB in the beginning and 53.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.82ms. Allocated memory is still 81.8MB. Free memory was 53.7MB in the beginning and 51.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 666.77ms. Allocated memory is still 81.8MB. Free memory was 51.9MB in the beginning and 33.5MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 592706.04ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 32.7MB in the beginning and 38.5MB in the end (delta: -5.9MB). Peak memory consumption was 31.7MB. 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 - ExceptionOrErrorResult: AssertionError: Expected only CPrimitive but got *CHAR de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Expected only CPrimitive but got *CHAR: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:360) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-26 00:02:23,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ba599e-9866-4c8a-a2d4-bc4a7b43eac3/bin/utaipan-ByfvJB40ur/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 Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Expected only CPrimitive but got *CHAR