./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh --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 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 --- 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-2329fc7 [2022-12-14 13:20:35,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:20:35,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:20:35,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:20:35,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:20:35,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:20:35,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:20:35,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:20:35,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:20:35,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:20:35,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:20:35,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:20:35,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:20:35,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:20:35,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:20:35,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:20:35,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:20:35,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:20:35,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:20:35,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:20:35,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:20:35,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:20:35,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:20:35,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:20:35,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:20:35,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:20:35,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:20:35,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:20:35,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:20:35,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:20:35,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:20:35,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:20:35,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:20:35,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:20:35,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:20:35,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:20:35,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:20:35,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:20:35,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:20:35,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:20:35,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:20:35,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:20:35,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:20:35,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:20:35,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:20:35,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:20:35,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:20:35,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:20:35,863 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:20:35,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:20:35,863 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:20:35,869 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:20:35,869 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:20:35,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:20:35,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:20:35,870 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:20:35,870 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:20:35,870 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:20:35,870 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:20:35,870 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:20:35,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:20:35,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:20:35,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:20:35,871 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:20:35,871 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:20:35,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:20:35,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:20:35,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:20:35,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:20:35,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:20:35,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:20:35,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:20:35,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:20:35,873 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:20:35,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:20:35,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:20:35,874 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_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 [2022-12-14 13:20:36,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:20:36,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:20:36,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:20:36,066 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:20:36,066 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:20:36,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2022-12-14 13:20:38,633 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:20:38,825 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:20:38,826 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2022-12-14 13:20:38,835 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/data/c1f63fefb/097607a145b940ecbda25a171ccdfd06/FLAG06e0bfccf [2022-12-14 13:20:39,193 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/data/c1f63fefb/097607a145b940ecbda25a171ccdfd06 [2022-12-14 13:20:39,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:20:39,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:20:39,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:20:39,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:20:39,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:20:39,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e17064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39, skipping insertion in model container [2022-12-14 13:20:39,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:20:39,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:20:39,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:20:39,438 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:20:39,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:20:39,481 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:20:39,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39 WrapperNode [2022-12-14 13:20:39,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:20:39,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:20:39,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:20:39,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:20:39,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,510 INFO L138 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-12-14 13:20:39,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:20:39,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:20:39,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:20:39,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:20:39,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:20:39,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:20:39,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:20:39,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:20:39,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (1/1) ... [2022-12-14 13:20:39,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:20:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:39,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:20:39,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:20:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:20:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:20:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:20:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:20:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:20:39,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:20:39,670 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:20:39,671 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:20:39,827 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:20:39,886 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:20:39,886 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:20:39,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:20:39 BoogieIcfgContainer [2022-12-14 13:20:39,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:20:39,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:20:39,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:20:39,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:20:39,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:20:39" (1/3) ... [2022-12-14 13:20:39,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc5ee28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:20:39, skipping insertion in model container [2022-12-14 13:20:39,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:20:39" (2/3) ... [2022-12-14 13:20:39,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc5ee28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:20:39, skipping insertion in model container [2022-12-14 13:20:39,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:20:39" (3/3) ... [2022-12-14 13:20:39,898 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-2.i [2022-12-14 13:20:39,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:20:39,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-12-14 13:20:39,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:20:39,956 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;@7905ee2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:20:39,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-14 13:20:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 2.2) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:20:39,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:39,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:20:39,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 133892, now seen corresponding path program 1 times [2022-12-14 13:20:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:39,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823743126] [2022-12-14 13:20:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:40,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:40,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823743126] [2022-12-14 13:20:40,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823743126] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:40,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:40,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:20:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060546026] [2022-12-14 13:20:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:40,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:40,468 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 2.2) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:40,573 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-12-14 13:20:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:20:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:20:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:40,583 INFO L225 Difference]: With dead ends: 46 [2022-12-14 13:20:40,583 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:20:40,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:20:40,588 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:40,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 25 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:20:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:20:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2022-12-14 13:20:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 13:20:40,618 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 3 [2022-12-14 13:20:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:40,618 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 13:20:40,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 13:20:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:20:40,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:40,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:20:40,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:20:40,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 133893, now seen corresponding path program 1 times [2022-12-14 13:20:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:40,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962116595] [2022-12-14 13:20:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:40,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962116595] [2022-12-14 13:20:40,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962116595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:40,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:40,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:20:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798888306] [2022-12-14 13:20:40,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:40,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:40,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:40,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:40,820 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:40,851 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-12-14 13:20:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:20:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:20:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:40,853 INFO L225 Difference]: With dead ends: 23 [2022-12-14 13:20:40,853 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 13:20:40,853 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 [2022-12-14 13:20:40,855 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:40,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 13 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 13:20:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 13:20:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 13:20:40,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 3 [2022-12-14 13:20:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:40,858 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 13:20:40,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 13:20:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:20:40,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:40,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:20:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:20:40,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 131435, now seen corresponding path program 1 times [2022-12-14 13:20:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603722556] [2022-12-14 13:20:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:40,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:40,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603722556] [2022-12-14 13:20:40,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603722556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:40,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:40,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:20:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250907082] [2022-12-14 13:20:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:40,963 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:41,033 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-12-14 13:20:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:20:41,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:20:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:41,035 INFO L225 Difference]: With dead ends: 44 [2022-12-14 13:20:41,035 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 13:20:41,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:20:41,036 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:41,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:20:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 13:20:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2022-12-14 13:20:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-12-14 13:20:41,041 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 3 [2022-12-14 13:20:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:41,042 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-12-14 13:20:41,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-12-14 13:20:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:20:41,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:41,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 13:20:41,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:20:41,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash 126379927, now seen corresponding path program 1 times [2022-12-14 13:20:41,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:41,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146442598] [2022-12-14 13:20:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:41,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:41,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146442598] [2022-12-14 13:20:41,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146442598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434181174] [2022-12-14 13:20:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:41,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:41,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:41,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:20:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:20:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:41,378 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 13:20:41,379 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 13:20:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434181174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097653540] [2022-12-14 13:20:41,608 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 13:20:41,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:20:41,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:20:41,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:20:41,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:20:41,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:41,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:20:41,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:41,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:41,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:41,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:20:42,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '266#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:20:42,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:20:42,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:20:42,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 13:20:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798796712] [2022-12-14 13:20:42,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:20:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:20:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:20:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:20:42,098 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:42,295 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-12-14 13:20:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:20:42,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:20:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:42,296 INFO L225 Difference]: With dead ends: 63 [2022-12-14 13:20:42,296 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 13:20:42,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:20:42,297 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 209 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:42,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 130 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:20:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 13:20:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 22. [2022-12-14 13:20:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-12-14 13:20:42,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2022-12-14 13:20:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:42,302 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-12-14 13:20:42,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-12-14 13:20:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:20:42,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:42,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:20:42,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:20:42,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:42,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -304350351, now seen corresponding path program 1 times [2022-12-14 13:20:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444736871] [2022-12-14 13:20:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:42,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:42,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444736871] [2022-12-14 13:20:42,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444736871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:42,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:42,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:20:42,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24894026] [2022-12-14 13:20:42,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:42,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:42,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:42,604 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:42,631 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-12-14 13:20:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:20:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:20:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:42,632 INFO L225 Difference]: With dead ends: 31 [2022-12-14 13:20:42,632 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 13:20:42,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:20:42,633 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 13:20:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-12-14 13:20:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 13:20:42,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2022-12-14 13:20:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 13:20:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 13:20:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:20:42,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:42,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:20:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:20:42,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -304394198, now seen corresponding path program 1 times [2022-12-14 13:20:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:42,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145772565] [2022-12-14 13:20:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:42,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145772565] [2022-12-14 13:20:42,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145772565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:42,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:42,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:20:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643224973] [2022-12-14 13:20:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:42,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:20:42,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:20:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:20:42,692 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:42,736 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 13:20:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:20:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:20:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:42,737 INFO L225 Difference]: With dead ends: 21 [2022-12-14 13:20:42,737 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 13:20:42,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:42,739 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:42,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 13:20:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 13:20:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 13:20:42,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-12-14 13:20:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:42,741 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 13:20:42,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 13:20:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:20:42,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:42,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:20:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:20:42,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash -304394197, now seen corresponding path program 1 times [2022-12-14 13:20:42,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:42,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996152144] [2022-12-14 13:20:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:42,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:42,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996152144] [2022-12-14 13:20:42,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996152144] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:42,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:20:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344497138] [2022-12-14 13:20:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:20:42,836 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:42,909 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-12-14 13:20:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:20:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:20:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:42,910 INFO L225 Difference]: With dead ends: 27 [2022-12-14 13:20:42,910 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 13:20:42,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:20:42,911 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:42,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 30 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 13:20:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-12-14 13:20:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 13:20:42,913 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2022-12-14 13:20:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:42,914 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 13:20:42,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:42,914 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 13:20:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:20:42,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:42,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:42,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:20:42,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash -846285529, now seen corresponding path program 1 times [2022-12-14 13:20:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583975234] [2022-12-14 13:20:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:43,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583975234] [2022-12-14 13:20:43,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583975234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:43,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:43,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:20:43,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167868264] [2022-12-14 13:20:43,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:20:43,036 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:43,091 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-12-14 13:20:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:20:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:20:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:43,092 INFO L225 Difference]: With dead ends: 22 [2022-12-14 13:20:43,092 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 13:20:43,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:20:43,093 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:43,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 13:20:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 13:20:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 13:20:43,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2022-12-14 13:20:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:43,095 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 13:20:43,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 13:20:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:20:43,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:43,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:43,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:20:43,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash -846285528, now seen corresponding path program 1 times [2022-12-14 13:20:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122637700] [2022-12-14 13:20:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:43,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:43,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122637700] [2022-12-14 13:20:43,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122637700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:43,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:43,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:20:43,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732094890] [2022-12-14 13:20:43,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:43,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:20:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:20:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:20:43,247 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:43,334 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-12-14 13:20:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:20:43,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:20:43,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:43,335 INFO L225 Difference]: With dead ends: 24 [2022-12-14 13:20:43,335 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 13:20:43,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:20:43,336 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:43,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 13:20:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-14 13:20:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 13:20:43,339 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2022-12-14 13:20:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:43,339 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 13:20:43,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 13:20:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:20:43,340 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:43,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:43,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:20:43,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:43,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1332772495, now seen corresponding path program 1 times [2022-12-14 13:20:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:43,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638315694] [2022-12-14 13:20:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:43,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:43,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638315694] [2022-12-14 13:20:43,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638315694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:43,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:43,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:20:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392661632] [2022-12-14 13:20:43,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:43,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:20:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:20:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:43,451 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:43,472 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-12-14 13:20:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:20:43,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:20:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:43,473 INFO L225 Difference]: With dead ends: 22 [2022-12-14 13:20:43,473 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 13:20:43,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:20:43,474 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:43,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 13:20:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 13:20:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 13:20:43,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2022-12-14 13:20:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:43,477 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 13:20:43,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 13:20:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:20:43,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:43,477 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:43,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:20:43,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1332772855, now seen corresponding path program 1 times [2022-12-14 13:20:43,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:43,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483156927] [2022-12-14 13:20:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:43,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:43,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483156927] [2022-12-14 13:20:43,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483156927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:43,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:43,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:20:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16130958] [2022-12-14 13:20:43,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:43,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:20:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:20:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:20:43,642 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:43,811 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-12-14 13:20:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:20:43,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:20:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:43,812 INFO L225 Difference]: With dead ends: 33 [2022-12-14 13:20:43,812 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 13:20:43,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:20:43,813 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:43,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 13:20:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-12-14 13:20:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-12-14 13:20:43,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 11 [2022-12-14 13:20:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:43,815 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-12-14 13:20:43,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-12-14 13:20:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:20:43,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:43,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:43,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:20:43,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1331442477, now seen corresponding path program 1 times [2022-12-14 13:20:43,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:43,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446512487] [2022-12-14 13:20:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:43,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:43,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446512487] [2022-12-14 13:20:43,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446512487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:43,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:43,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:20:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966582527] [2022-12-14 13:20:43,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:43,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:20:43,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:20:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:20:43,855 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:43,894 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-14 13:20:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:20:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:20:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:43,895 INFO L225 Difference]: With dead ends: 26 [2022-12-14 13:20:43,895 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 13:20:43,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:20:43,896 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:43,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:20:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 13:20:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 13:20:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 13:20:43,899 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2022-12-14 13:20:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:43,899 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 13:20:43,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 13:20:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:20:43,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:43,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:43,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:20:43,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1331442478, now seen corresponding path program 1 times [2022-12-14 13:20:43,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:43,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772440378] [2022-12-14 13:20:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:43,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:44,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:44,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772440378] [2022-12-14 13:20:44,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772440378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:20:44,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:20:44,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:20:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624157924] [2022-12-14 13:20:44,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:20:44,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:20:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:20:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:20:44,219 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:44,561 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-12-14 13:20:44,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:20:44,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:20:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:44,562 INFO L225 Difference]: With dead ends: 30 [2022-12-14 13:20:44,562 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 13:20:44,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:20:44,563 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:44,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:20:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 13:20:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 13:20:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-12-14 13:20:44,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-12-14 13:20:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:44,565 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-12-14 13:20:44,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-12-14 13:20:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:20:44,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:44,565 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:44,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:20:44,565 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 821295651, now seen corresponding path program 1 times [2022-12-14 13:20:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:44,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174711639] [2022-12-14 13:20:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:44,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174711639] [2022-12-14 13:20:44,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174711639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:44,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869013887] [2022-12-14 13:20:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:44,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:44,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:44,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:20:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:44,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:20:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:44,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:45,033 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 5 treesize of output 3 [2022-12-14 13:20:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:45,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869013887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1894238303] [2022-12-14 13:20:45,056 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:20:45,056 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:20:45,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:20:45,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:20:45,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:20:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:45,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:20:45,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:45,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:45,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:45,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:45,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:45,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:45,342 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:20:45,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:20:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:45,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:45,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:45,550 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:20:45,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:20:45,684 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:20:45,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:20:45,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:20:47,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1007#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:20:47,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:20:47,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:20:47,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-12-14 13:20:47,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821518664] [2022-12-14 13:20:47,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:20:47,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 13:20:47,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 13:20:47,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-12-14 13:20:47,195 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:47,427 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-12-14 13:20:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:20:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 13:20:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:47,428 INFO L225 Difference]: With dead ends: 48 [2022-12-14 13:20:47,428 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 13:20:47,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 13:20:47,428 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:47,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 79 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:20:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 13:20:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-12-14 13:20:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-14 13:20:47,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2022-12-14 13:20:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:47,431 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-14 13:20:47,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-14 13:20:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:20:47,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:47,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:47,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:20:47,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:20:47,634 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 980834032, now seen corresponding path program 1 times [2022-12-14 13:20:47,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487009385] [2022-12-14 13:20:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:48,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487009385] [2022-12-14 13:20:48,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487009385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396085243] [2022-12-14 13:20:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:48,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:48,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:48,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:48,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:20:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 13:20:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:48,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:48,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:20:48,219 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 10 treesize of output 8 [2022-12-14 13:20:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:48,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:49,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396085243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861170623] [2022-12-14 13:20:49,177 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 13:20:49,177 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:20:49,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:20:49,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:20:49,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:20:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:49,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:20:49,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:49,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:49,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-12-14 13:20:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:49,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 35 [2022-12-14 13:20:49,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:20:49,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:20:49,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:20:52,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1223#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= |ULTIMATE.start_main_~length~0#1| 1) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_cstrncpy_~s~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:20:52,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:20:52,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:20:52,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-14 13:20:52,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132444301] [2022-12-14 13:20:52,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:20:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:20:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:20:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 13:20:52,720 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:54,040 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-12-14 13:20:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 13:20:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 13:20:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:54,041 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:20:54,041 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 13:20:54,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=510, Invalid=3030, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:20:54,042 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:54,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:20:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 13:20:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-12-14 13:20:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-12-14 13:20:54,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2022-12-14 13:20:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:54,044 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-12-14 13:20:54,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-12-14 13:20:54,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:20:54,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:54,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:54,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:20:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:20:54,246 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:54,247 INFO L85 PathProgramCache]: Analyzing trace with hash -309638608, now seen corresponding path program 1 times [2022-12-14 13:20:54,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:54,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017147408] [2022-12-14 13:20:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:54,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:20:54,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017147408] [2022-12-14 13:20:54,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017147408] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138002630] [2022-12-14 13:20:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:54,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:54,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:54,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:20:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 13:20:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:54,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 13:20:54,683 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 10 treesize of output 8 [2022-12-14 13:20:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:20:54,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:20:55,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138002630] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:55,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680428720] [2022-12-14 13:20:55,235 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:20:55,235 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:20:55,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:20:55,236 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:20:55,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:20:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:55,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:20:55,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:20:55,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:55,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:55,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:55,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:55,476 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:20:55,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:20:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:55,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:55,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:55,604 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:20:55,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 52 treesize of output 54 [2022-12-14 13:20:55,715 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:20:55,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:20:55,800 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:20:57,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1439#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:20:57,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:20:57,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:20:57,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-14 13:20:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392440181] [2022-12-14 13:20:57,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:20:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:20:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:20:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:20:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:20:57,215 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:20:58,068 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-12-14 13:20:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:20:58,068 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 13:20:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:20:58,068 INFO L225 Difference]: With dead ends: 26 [2022-12-14 13:20:58,068 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 13:20:58,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 13:20:58,070 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:20:58,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 32 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:20:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 13:20:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-12-14 13:20:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-12-14 13:20:58,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 14 [2022-12-14 13:20:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:20:58,072 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-12-14 13:20:58,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:20:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-12-14 13:20:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:20:58,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:20:58,073 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:20:58,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 13:20:58,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:20:58,275 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:20:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:20:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1166758143, now seen corresponding path program 2 times [2022-12-14 13:20:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:20:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709403770] [2022-12-14 13:20:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:20:58,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:20:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:20:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:58,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:20:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709403770] [2022-12-14 13:20:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709403770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:20:58,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882588704] [2022-12-14 13:20:58,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:20:58,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:20:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:20:58,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:20:58,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:20:58,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:20:58,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:20:58,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 13:20:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:20:58,728 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 10 treesize of output 8 [2022-12-14 13:20:58,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:58,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:20:58,985 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 13:20:58,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-14 13:20:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:20:58,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:20:59,070 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_209 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_209) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:20:59,076 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_209 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_209) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src#1.offset| 1)) 0)) is different from false [2022-12-14 13:20:59,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:20:59,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:20:59,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:20:59,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:20:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 13:20:59,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882588704] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:20:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921607023] [2022-12-14 13:20:59,189 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:20:59,189 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:20:59,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:20:59,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:20:59,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:20:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:59,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:20:59,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:20:59,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:59,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:59,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:20:59,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:59,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:59,429 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:20:59,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:20:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:20:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:59,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:20:59,554 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:20:59,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:20:59,637 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:20:59,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:20:59,719 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:01,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1648#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:01,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:01,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:01,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-12-14 13:21:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030037161] [2022-12-14 13:21:01,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:01,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 13:21:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 13:21:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1128, Unknown=11, NotChecked=138, Total=1406 [2022-12-14 13:21:01,121 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:01,465 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-12-14 13:21:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:21:01,466 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 13:21:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:01,466 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:21:01,466 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:21:01,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=267, Invalid=1892, Unknown=11, NotChecked=182, Total=2352 [2022-12-14 13:21:01,467 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:01,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 96 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-12-14 13:21:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:21:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-12-14 13:21:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-12-14 13:21:01,469 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 18 [2022-12-14 13:21:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:01,469 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-12-14 13:21:01,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-12-14 13:21:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:21:01,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:01,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:21:01,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:01,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:21:01,672 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1165427766, now seen corresponding path program 1 times [2022-12-14 13:21:01,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:01,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954005903] [2022-12-14 13:21:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:01,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:21:02,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:02,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954005903] [2022-12-14 13:21:02,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954005903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799791530] [2022-12-14 13:21:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:02,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:02,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:21:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 13:21:02,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:02,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:21:02,324 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 10 treesize of output 8 [2022-12-14 13:21:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:21:02,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:21:03,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799791530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678749271] [2022-12-14 13:21:03,132 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:21:03,132 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:03,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:03,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:03,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:03,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:03,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:03,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:03,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:03,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:03,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:03,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:03,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:03,329 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:03,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:03,405 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:03,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:03,468 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:03,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:03,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:05,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1894#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#t~post7#1.offset| (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|)) (not (= (mod |ULTIMATE.start_cstrncpy_~n#1| 4294967296) 0)) (<= 1 |ULTIMATE.start_cstrncpy_#t~post7#1.offset|) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#t~post7#1.base| |ULTIMATE.start_cstrncpy_~d~0#1.base|) (= (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1) |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) 1) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (= (select |#valid| |ULTIMATE.start_cstrncpy_~s~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ (- 1) |ULTIMATE.start_cstrncpy_#t~post7#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrncpy_~s~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post7#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_cstrncpy_~s~0#1.offset| (select |#length| |ULTIMATE.start_cstrncpy_~s~0#1.base|)) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483646) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:05,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:05,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:05,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-14 13:21:05,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949683552] [2022-12-14 13:21:05,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:21:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:21:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:21:05,487 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:06,418 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-12-14 13:21:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 13:21:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 13:21:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:06,418 INFO L225 Difference]: With dead ends: 41 [2022-12-14 13:21:06,418 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 13:21:06,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=366, Invalid=3174, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:21:06,420 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:06,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 34 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:21:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 13:21:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-14 13:21:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 13:21:06,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2022-12-14 13:21:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:06,423 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 13:21:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 13:21:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:21:06,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:06,423 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:21:06,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:21:06,625 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1690193235, now seen corresponding path program 3 times [2022-12-14 13:21:06,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274469029] [2022-12-14 13:21:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:06,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:06,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:06,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274469029] [2022-12-14 13:21:06,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274469029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:06,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727824363] [2022-12-14 13:21:06,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:21:06,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:06,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:06,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:06,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:21:06,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:21:06,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:06,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 13:21:06,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:06,922 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:21:06,922 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:21:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:07,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:07,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727824363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:07,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644650489] [2022-12-14 13:21:07,196 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:07,196 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:07,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:07,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:07,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:07,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:07,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:07,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:07,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:07,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:07,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:07,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:07,440 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:07,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:07,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:07,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:07,572 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:21:07,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 52 treesize of output 54 [2022-12-14 13:21:07,674 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:07,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:07,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:09,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2141#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:09,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:09,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:09,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-14 13:21:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910656888] [2022-12-14 13:21:09,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:09,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:21:09,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:21:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:21:09,391 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:09,726 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-12-14 13:21:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:21:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 13:21:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:09,727 INFO L225 Difference]: With dead ends: 30 [2022-12-14 13:21:09,727 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 13:21:09,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 13:21:09,727 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 210 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:09,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 22 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:21:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 13:21:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-12-14 13:21:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-12-14 13:21:09,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2022-12-14 13:21:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:09,729 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-12-14 13:21:09,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-12-14 13:21:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:21:09,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:09,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:21:09,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:21:09,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:09,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 856382720, now seen corresponding path program 2 times [2022-12-14 13:21:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726274065] [2022-12-14 13:21:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:10,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:10,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726274065] [2022-12-14 13:21:10,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726274065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:10,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023806423] [2022-12-14 13:21:10,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:21:10,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:10,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:10,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:10,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:21:10,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:21:10,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 13:21:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:10,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 13:21:10,673 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 10 treesize of output 8 [2022-12-14 13:21:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:21:11,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:21:11,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023806423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477690979] [2022-12-14 13:21:11,679 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:11,679 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:11,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:11,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:11,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:11,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:11,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:21:11,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:11,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:11,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:11,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:11,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:11,880 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:11,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:11,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:11,987 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:21:11,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:21:12,067 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:12,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:12,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:13,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2382#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:13,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:13,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:13,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2022-12-14 13:21:13,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966484799] [2022-12-14 13:21:13,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:13,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 13:21:13,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:13,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 13:21:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1893, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 13:21:13,703 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:15,537 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-12-14 13:21:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:21:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:21:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:15,537 INFO L225 Difference]: With dead ends: 41 [2022-12-14 13:21:15,538 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 13:21:15,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=451, Invalid=3709, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:21:15,539 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 3 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:21:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 13:21:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-12-14 13:21:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-12-14 13:21:15,540 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 21 [2022-12-14 13:21:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:15,540 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-12-14 13:21:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-12-14 13:21:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:21:15,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:15,541 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 13:21:15,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:21:15,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:15,743 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash -735740977, now seen corresponding path program 4 times [2022-12-14 13:21:15,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:15,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258713880] [2022-12-14 13:21:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:15,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:16,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258713880] [2022-12-14 13:21:16,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258713880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351766574] [2022-12-14 13:21:16,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:21:16,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:16,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:16,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:21:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 13:21:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:16,233 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 10 treesize of output 8 [2022-12-14 13:21:16,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:16,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:21:16,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:21:16,454 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 [2022-12-14 13:21:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:16,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:16,501 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_343) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:21:16,512 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_342 (Array Int Int)) (v_ArrVal_343 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_342) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_343) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2022-12-14 13:21:16,563 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_343) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:21:16,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:16,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:21:16,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:16,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:21:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-12-14 13:21:16,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351766574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:16,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645997595] [2022-12-14 13:21:16,685 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:16,685 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:16,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:16,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:16,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:16,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:16,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:21:16,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:16,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:16,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:16,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:16,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:16,910 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:16,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:17,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:17,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:17,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:17,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:17,038 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:21:17,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:21:17,140 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:17,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:17,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:18,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2684#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:18,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:18,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:18,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 31 [2022-12-14 13:21:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884802332] [2022-12-14 13:21:18,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:21:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:21:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1270, Unknown=21, NotChecked=222, Total=1640 [2022-12-14 13:21:18,708 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:19,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:19,189 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-12-14 13:21:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 13:21:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 13:21:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:19,190 INFO L225 Difference]: With dead ends: 57 [2022-12-14 13:21:19,190 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 13:21:19,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=263, Invalid=2177, Unknown=22, NotChecked=294, Total=2756 [2022-12-14 13:21:19,192 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 8 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:19,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 108 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 332 Invalid, 15 Unknown, 81 Unchecked, 0.2s Time] [2022-12-14 13:21:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 13:21:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-12-14 13:21:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-14 13:21:19,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2022-12-14 13:21:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:19,194 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-14 13:21:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-14 13:21:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 13:21:19,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:19,195 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 13:21:19,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:21:19,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:21:19,396 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1455536379, now seen corresponding path program 5 times [2022-12-14 13:21:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122374015] [2022-12-14 13:21:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:19,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:19,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122374015] [2022-12-14 13:21:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122374015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921218520] [2022-12-14 13:21:19,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:21:19,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:19,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:19,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:21:20,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:21:20,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 13:21:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:20,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:20,459 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 7 treesize of output 5 [2022-12-14 13:21:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:20,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921218520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:20,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500288093] [2022-12-14 13:21:20,497 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:20,497 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:20,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:20,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:20,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:20,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:20,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:20,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:21:20,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:20,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:20,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:20,679 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:20,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:20,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:20,803 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:21:20,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:21:20,885 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:20,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:20,964 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:22,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3001#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:22,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:22,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:22,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-14 13:21:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446081239] [2022-12-14 13:21:22,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:22,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 13:21:22,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 13:21:22,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:21:22,440 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:22,788 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-12-14 13:21:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:21:22,788 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 13:21:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:22,789 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:21:22,789 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 13:21:22,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 13:21:22,790 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 193 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:22,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 27 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:21:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 13:21:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 13:21:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-12-14 13:21:22,791 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 27 [2022-12-14 13:21:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:22,791 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-12-14 13:21:22,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-12-14 13:21:22,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:21:22,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:22,791 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 13:21:22,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 13:21:22,993 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1631263015, now seen corresponding path program 6 times [2022-12-14 13:21:22,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958347902] [2022-12-14 13:21:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:22,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:23,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958347902] [2022-12-14 13:21:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958347902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363683245] [2022-12-14 13:21:23,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:21:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:23,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:23,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:21:23,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:21:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 13:21:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:23,664 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 10 treesize of output 8 [2022-12-14 13:21:23,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:23,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:21:23,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:21:23,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:21:23,977 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 [2022-12-14 13:21:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:23,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:23,988 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_429) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:21:28,126 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_429) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:21:28,133 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_427 (Array Int Int)) (v_ArrVal_429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_427) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_429) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:21:28,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:28,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:21:28,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:28,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:21:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2022-12-14 13:21:28,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363683245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:28,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117584162] [2022-12-14 13:21:28,352 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:28,352 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:28,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:28,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:28,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:28,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:28,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:28,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:28,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:28,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:28,566 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:28,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:28,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:28,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:28,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:28,665 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:21:28,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:21:28,743 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:28,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:28,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:30,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3338#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:30,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:30,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:30,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 39 [2022-12-14 13:21:30,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422465826] [2022-12-14 13:21:30,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:30,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 13:21:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 13:21:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1880, Unknown=46, NotChecked=270, Total=2352 [2022-12-14 13:21:30,832 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:31,651 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-12-14 13:21:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:21:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-14 13:21:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:31,652 INFO L225 Difference]: With dead ends: 64 [2022-12-14 13:21:31,652 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:21:31,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=255, Invalid=2790, Unknown=47, NotChecked=330, Total=3422 [2022-12-14 13:21:31,653 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:31,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 134 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 525 Invalid, 1 Unknown, 97 Unchecked, 0.3s Time] [2022-12-14 13:21:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:21:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-12-14 13:21:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-14 13:21:31,654 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2022-12-14 13:21:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:31,655 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-14 13:21:31,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 39 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-14 13:21:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 13:21:31,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:31,655 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 13:21:31,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:31,856 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2038690427, now seen corresponding path program 7 times [2022-12-14 13:21:31,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:31,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516182872] [2022-12-14 13:21:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:31,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:32,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:32,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516182872] [2022-12-14 13:21:32,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516182872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:32,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764009154] [2022-12-14 13:21:32,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:21:32,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:32,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:32,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:32,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:21:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 13:21:32,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:32,694 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 5 treesize of output 3 [2022-12-14 13:21:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:32,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764009154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818544381] [2022-12-14 13:21:32,754 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:32,754 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:32,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:32,755 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:32,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:32,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:32,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:32,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:32,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:32,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:32,963 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:32,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:33,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:33,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:33,066 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:21:33,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:21:33,150 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:33,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:33,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:34,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3704#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:34,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:34,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:34,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-12-14 13:21:34,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035175680] [2022-12-14 13:21:34,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:34,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 13:21:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:34,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 13:21:34,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:21:34,822 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:35,338 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-12-14 13:21:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 13:21:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 13:21:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:35,339 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:21:35,339 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:21:35,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=411, Invalid=2345, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:21:35,341 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 221 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:35,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 43 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:21:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:21:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-12-14 13:21:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-12-14 13:21:35,343 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 34 [2022-12-14 13:21:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:35,344 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-12-14 13:21:35,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-12-14 13:21:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 13:21:35,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:35,344 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 13:21:35,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:21:35,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:21:35,545 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash -966733913, now seen corresponding path program 8 times [2022-12-14 13:21:35,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:35,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218711716] [2022-12-14 13:21:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:35,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:36,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218711716] [2022-12-14 13:21:36,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218711716] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313042010] [2022-12-14 13:21:36,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:21:36,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:36,214 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:36,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:21:36,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:21:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-14 13:21:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:36,670 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 10 treesize of output 8 [2022-12-14 13:21:36,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:21:37,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:21:37,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:21:37,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:21:37,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:21:37,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:37,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:37,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:21:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:37,584 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_532) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:21:43,832 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_532) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:21:47,934 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_532) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:21:47,946 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_529 (Array Int Int)) (v_ArrVal_532 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_529) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_532) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:21:47,953 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_532) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:21:48,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:48,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:21:48,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:21:48,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:21:48,045 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 7 treesize of output 3 [2022-12-14 13:21:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2022-12-14 13:21:48,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313042010] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657869568] [2022-12-14 13:21:48,311 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:48,311 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:48,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:48,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:48,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:48,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:48,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:48,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:48,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:48,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:48,510 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:48,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:48,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:48,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:48,634 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:21:48,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:21:48,706 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:48,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:48,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:50,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4111#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:50,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:50,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:50,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 58 [2022-12-14 13:21:50,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723983775] [2022-12-14 13:21:50,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:50,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 13:21:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 13:21:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3654, Unknown=45, NotChecked=630, Total=4556 [2022-12-14 13:21:50,920 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:52,513 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-12-14 13:21:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 13:21:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 13:21:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:52,514 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:21:52,514 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:21:52,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=460, Invalid=5991, Unknown=49, NotChecked=810, Total=7310 [2022-12-14 13:21:52,516 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 111 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 12 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:52,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 197 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 953 Invalid, 11 Unknown, 198 Unchecked, 0.5s Time] [2022-12-14 13:21:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:21:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-14 13:21:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-12-14 13:21:52,518 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2022-12-14 13:21:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:52,518 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-12-14 13:21:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 58 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-12-14 13:21:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:21:52,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:52,519 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-12-14 13:21:52,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:52,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 13:21:52,720 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1107595219, now seen corresponding path program 9 times [2022-12-14 13:21:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:52,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243064445] [2022-12-14 13:21:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:52,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:53,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:53,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243064445] [2022-12-14 13:21:53,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243064445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:53,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785415954] [2022-12-14 13:21:53,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:21:53,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:53,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:53,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:53,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:21:53,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:21:53,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 13:21:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:53,401 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:21:53,402 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:21:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:53,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:21:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:21:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785415954] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:21:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536586244] [2022-12-14 13:21:53,951 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:21:53,951 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:21:53,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:21:53,951 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:21:53,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:21:53,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:53,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:21:53,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:54,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:54,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:54,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:21:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:54,150 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:21:54,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:21:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:54,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:21:54,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:54,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:21:54,272 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:21:54,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:21:54,342 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:21:54,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:21:54,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:21:56,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:21:56,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:21:56,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:21:56,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-12-14 13:21:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930420130] [2022-12-14 13:21:56,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:21:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:21:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:21:56,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:21:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:21:56,130 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:21:56,796 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-12-14 13:21:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:21:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 13:21:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:21:56,797 INFO L225 Difference]: With dead ends: 51 [2022-12-14 13:21:56,797 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 13:21:56,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=669, Invalid=3491, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:21:56,797 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 253 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:21:56,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 52 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:21:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 13:21:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-12-14 13:21:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-12-14 13:21:56,798 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2022-12-14 13:21:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:21:56,799 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-12-14 13:21:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:21:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-12-14 13:21:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 13:21:56,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:21:56,799 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-12-14 13:21:56,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:21:57,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:57,000 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:21:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:21:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash -24286592, now seen corresponding path program 3 times [2022-12-14 13:21:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:21:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499486850] [2022-12-14 13:21:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:21:57,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:21:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:21:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:21:57,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:21:57,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499486850] [2022-12-14 13:21:57,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499486850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:21:57,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306357052] [2022-12-14 13:21:57,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:21:57,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:21:57,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:21:57,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:21:57,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:21:57,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:21:57,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:21:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 13:21:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:21:57,970 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-12-14 13:21:57,970 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 13:21:57,975 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 10 treesize of output 8 [2022-12-14 13:21:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:21:59,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:22:00,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306357052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:00,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086549199] [2022-12-14 13:22:00,120 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:22:00,120 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:22:00,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:22:00,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:22:00,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:22:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:00,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:22:00,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:00,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:00,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:00,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:00,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:00,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:00,317 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:22:00,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:22:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:00,424 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:22:00,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:22:00,510 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:22:00,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:22:00,583 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:22:02,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4993#(and (= |ULTIMATE.start_cstrncpy_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) |ULTIMATE.start_cstrncpy_#t~post4#1.offset|)) (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1) (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:22:02,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:22:02,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:22:02,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-12-14 13:22:02,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675213767] [2022-12-14 13:22:02,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:22:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 13:22:02,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:02,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 13:22:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:22:02,948 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 56 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 55 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:05,111 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-12-14 13:22:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:22:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 55 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 13:22:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:05,112 INFO L225 Difference]: With dead ends: 49 [2022-12-14 13:22:05,112 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 13:22:05,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=760, Invalid=6550, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 13:22:05,113 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 119 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:05,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 20 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:22:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 13:22:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-12-14 13:22:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-12-14 13:22:05,114 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-12-14 13:22:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:05,114 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-12-14 13:22:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 55 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-12-14 13:22:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 13:22:05,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:05,115 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2022-12-14 13:22:05,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:22:05,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 13:22:05,316 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:22:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash -857421489, now seen corresponding path program 10 times [2022-12-14 13:22:05,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379700742] [2022-12-14 13:22:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:06,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379700742] [2022-12-14 13:22:06,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379700742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:22:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857712814] [2022-12-14 13:22:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:22:06,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:06,286 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:06,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:22:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-14 13:22:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:06,398 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 10 treesize of output 8 [2022-12-14 13:22:06,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:06,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:22:06,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:06,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:06,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:06,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:22:07,029 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 [2022-12-14 13:22:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:07,041 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_713) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:22:07,104 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int)) (v_ArrVal_712 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_712) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:22:07,170 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_711 (Array Int Int)) (v_ArrVal_713 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_711) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:22:13,638 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:22:17,830 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_713 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_713) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:22:17,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:17,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:22:17,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:17,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:22:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 42 not checked. [2022-12-14 13:22:18,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857712814] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966372337] [2022-12-14 13:22:18,058 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:22:18,058 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:22:18,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:22:18,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:22:18,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:22:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:18,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:22:18,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:18,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:18,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:18,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:18,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:18,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:18,293 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:22:18,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:22:18,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:18,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:18,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:18,424 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:22:18,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:22:18,506 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:22:18,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:22:18,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:22:21,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5468#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:22:21,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:22:21,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:22:21,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 57 [2022-12-14 13:22:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478819396] [2022-12-14 13:22:21,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:22:21,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 13:22:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 13:22:21,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3508, Unknown=77, NotChecked=620, Total=4422 [2022-12-14 13:22:21,021 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 58 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 57 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:22,795 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-12-14 13:22:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 13:22:22,795 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 57 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 13:22:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:22,796 INFO L225 Difference]: With dead ends: 81 [2022-12-14 13:22:22,796 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 13:22:22,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 89 ConstructedPredicates, 5 IntricatePredicates, 3 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=505, Invalid=6747, Unknown=78, NotChecked=860, Total=8190 [2022-12-14 13:22:22,797 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 18 mSolverCounterUnsat, 37 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 37 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:22,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 191 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1012 Invalid, 37 Unknown, 237 Unchecked, 0.6s Time] [2022-12-14 13:22:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 13:22:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-12-14 13:22:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-12-14 13:22:22,799 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2022-12-14 13:22:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:22,799 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-12-14 13:22:22,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 57 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-12-14 13:22:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 13:22:22,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:22,799 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2022-12-14 13:22:22,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:22:23,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 13:22:23,001 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:22:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1077723043, now seen corresponding path program 11 times [2022-12-14 13:22:23,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:23,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021015278] [2022-12-14 13:22:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:23,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:23,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:23,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021015278] [2022-12-14 13:22:23,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021015278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:22:23,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279899520] [2022-12-14 13:22:23,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:22:23,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:23,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:23,506 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:23,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:22:24,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:22:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:22:24,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 13:22:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:24,199 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:22:24,199 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:22:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:25,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279899520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:25,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552527308] [2022-12-14 13:22:25,083 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:22:25,083 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:22:25,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:22:25,083 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:22:25,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:22:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:25,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:22:25,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:25,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:25,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:25,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:25,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:25,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:25,284 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:22:25,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:22:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:25,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:25,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:25,402 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:22:25,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:22:25,475 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:22:25,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:22:25,561 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:22:27,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5990#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:22:27,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:22:27,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:22:27,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 13:22:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646538290] [2022-12-14 13:22:27,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:22:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 13:22:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 13:22:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=3384, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 13:22:27,533 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 52 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:28,338 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-12-14 13:22:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:22:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 52 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 13:22:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:28,339 INFO L225 Difference]: With dead ends: 56 [2022-12-14 13:22:28,339 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 13:22:28,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1009, Invalid=5153, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 13:22:28,340 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 468 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:28,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 61 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:22:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 13:22:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-12-14 13:22:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-12-14 13:22:28,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2022-12-14 13:22:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:28,341 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-12-14 13:22:28,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 52 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-12-14 13:22:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 13:22:28,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:28,342 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2022-12-14 13:22:28,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:22:28,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 13:22:28,543 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:22:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2006844545, now seen corresponding path program 12 times [2022-12-14 13:22:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:28,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078007112] [2022-12-14 13:22:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:28,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:29,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078007112] [2022-12-14 13:22:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078007112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:22:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022832025] [2022-12-14 13:22:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:22:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:29,591 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:22:29,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:22:29,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:22:29,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 174 conjunts are in the unsatisfiable core [2022-12-14 13:22:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:29,842 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 10 treesize of output 8 [2022-12-14 13:22:30,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:22:30,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:30,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:30,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:30,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:30,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:31,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:31,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:31,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:22:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:31,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:31,368 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int)) (v_ArrVal_851 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_851) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_852) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:22:31,376 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_852) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:22:31,384 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int)) (v_ArrVal_852 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_850) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_852) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:22:35,859 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_847 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_847) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:22:35,946 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_847 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_847) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:22:35,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:35,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:22:35,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:35,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:22:35,958 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 7 treesize of output 3 [2022-12-14 13:22:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 47 not checked. [2022-12-14 13:22:36,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022832025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602661834] [2022-12-14 13:22:36,443 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:22:36,443 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:22:36,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:22:36,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:22:36,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:22:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:36,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:22:36,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:36,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:36,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:36,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:36,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:36,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:36,658 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:22:36,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:22:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:36,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:36,772 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:22:36,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:22:36,871 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:22:36,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:22:36,976 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:22:39,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6532#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:22:39,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:22:39,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:22:39,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 26] total 76 [2022-12-14 13:22:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384195429] [2022-12-14 13:22:39,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:22:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 13:22:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 13:22:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6137, Unknown=72, NotChecked=810, Total=7310 [2022-12-14 13:22:39,116 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 77 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 76 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:41,500 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2022-12-14 13:22:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 13:22:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 76 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-12-14 13:22:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:41,500 INFO L225 Difference]: With dead ends: 93 [2022-12-14 13:22:41,501 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 13:22:41,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=579, Invalid=10081, Unknown=72, NotChecked=1040, Total=11772 [2022-12-14 13:22:41,502 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 118 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 22 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:41,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 298 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1666 Invalid, 25 Unknown, 271 Unchecked, 0.8s Time] [2022-12-14 13:22:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 13:22:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-12-14 13:22:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-12-14 13:22:41,503 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2022-12-14 13:22:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:41,503 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-12-14 13:22:41,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 76 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-12-14 13:22:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 13:22:41,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:41,504 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2022-12-14 13:22:41,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:22:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:41,705 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:22:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1814822571, now seen corresponding path program 13 times [2022-12-14 13:22:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453468863] [2022-12-14 13:22:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:42,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:42,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453468863] [2022-12-14 13:22:42,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453468863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:22:42,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312599390] [2022-12-14 13:22:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:22:42,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:42,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:42,313 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:42,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:22:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 13:22:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:42,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:43,118 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 5 treesize of output 3 [2022-12-14 13:22:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:43,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312599390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:22:43,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309201972] [2022-12-14 13:22:43,258 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:22:43,258 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:22:43,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:22:43,259 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:22:43,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:22:43,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:43,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:22:43,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:22:43,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:43,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:43,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:22:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:43,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:43,450 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:22:43,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:22:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:22:43,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:43,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:43,580 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:22:43,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:22:43,650 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:22:43,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:22:43,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:22:45,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7105#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:22:45,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:22:45,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:22:45,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 41 [2022-12-14 13:22:45,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831301962] [2022-12-14 13:22:45,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:22:45,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 13:22:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:22:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 13:22:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:22:45,741 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 43 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 42 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:22:46,506 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2022-12-14 13:22:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 13:22:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 42 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 13:22:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:22:46,506 INFO L225 Difference]: With dead ends: 63 [2022-12-14 13:22:46,506 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 13:22:46,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 117 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 13:22:46,507 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 402 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:22:46,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 85 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:22:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 13:22:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-12-14 13:22:46,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-12-14 13:22:46,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2022-12-14 13:22:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:22:46,509 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-12-14 13:22:46,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.7142857142857144) internal successors, (114), 42 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:22:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-12-14 13:22:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 13:22:46,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:22:46,510 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2022-12-14 13:22:46,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 13:22:46,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:46,712 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:22:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:22:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash 147382647, now seen corresponding path program 14 times [2022-12-14 13:22:46,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:22:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767508430] [2022-12-14 13:22:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:22:46,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:22:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:22:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:48,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:22:48,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767508430] [2022-12-14 13:22:48,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767508430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:22:48,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762522131] [2022-12-14 13:22:48,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:22:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:22:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:22:48,017 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:22:48,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:22:48,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 13:22:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:22:48,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 190 conjunts are in the unsatisfiable core [2022-12-14 13:22:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:22:48,865 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 10 treesize of output 8 [2022-12-14 13:22:49,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:22:49,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:49,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:49,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:49,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:50,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:50,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:50,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:22:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:22:50,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:22:50,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:22:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:22:50,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:22:50,708 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1007 (Array Int Int)) (v_ArrVal_1006 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1006) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1007) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:22:58,911 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1007 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1007) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:23:05,157 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_1003 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1003) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0))) is different from false [2022-12-14 13:23:05,202 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_1002 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1002) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:23:05,407 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1001 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1001) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:23:05,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:23:05,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:23:05,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:23:05,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:23:05,421 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 7 treesize of output 3 [2022-12-14 13:23:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 56 not checked. [2022-12-14 13:23:05,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762522131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612762710] [2022-12-14 13:23:05,810 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:23:05,810 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:23:05,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:23:05,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:23:05,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:23:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:05,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:23:05,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:23:05,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:05,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:05,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:06,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:06,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:06,036 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:23:06,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:23:06,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:06,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:06,151 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:23:06,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:23:06,228 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:23:06,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:23:06,306 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:23:09,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7716#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:23:09,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:23:09,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:23:09,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29, 29] total 85 [2022-12-14 13:23:09,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621306150] [2022-12-14 13:23:09,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:23:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 13:23:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:09,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 13:23:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=7611, Unknown=97, NotChecked=900, Total=8930 [2022-12-14 13:23:09,152 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 86 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:11,722 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-12-14 13:23:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 13:23:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-14 13:23:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:11,723 INFO L225 Difference]: With dead ends: 105 [2022-12-14 13:23:11,723 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 13:23:11,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 110 SyntacticMatches, 13 SemanticMatches, 121 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 4468 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=681, Invalid=13046, Unknown=99, NotChecked=1180, Total=15006 [2022-12-14 13:23:11,724 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 178 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 28 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:11,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 338 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1920 Invalid, 14 Unknown, 319 Unchecked, 0.8s Time] [2022-12-14 13:23:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 13:23:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-12-14 13:23:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-12-14 13:23:11,725 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-12-14 13:23:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:11,725 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-12-14 13:23:11,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-12-14 13:23:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 13:23:11,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:11,726 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2022-12-14 13:23:11,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:23:11,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 13:23:11,928 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:23:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1409731381, now seen corresponding path program 15 times [2022-12-14 13:23:11,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:11,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385840116] [2022-12-14 13:23:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 36 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:12,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385840116] [2022-12-14 13:23:12,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385840116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866356393] [2022-12-14 13:23:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:23:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:12,626 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:12,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:23:12,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:23:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 13:23:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:13,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:13,531 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 5 treesize of output 3 [2022-12-14 13:23:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:13,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866356393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:13,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363172510] [2022-12-14 13:23:13,654 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:23:13,654 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:23:13,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:23:13,655 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:23:13,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:23:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:13,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:23:13,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:13,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:13,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:13,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:13,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:13,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:13,872 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:23:13,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:23:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:13,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:13,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:13,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:13,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:13,977 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:23:13,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:23:14,077 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:23:14,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:23:14,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:23:15,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8364#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:23:15,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:23:15,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:23:15,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2022-12-14 13:23:15,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260809297] [2022-12-14 13:23:15,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:23:15,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 13:23:15,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:15,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 13:23:15,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2795, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 13:23:15,568 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 47 states, 46 states have (on average 2.782608695652174) internal successors, (128), 46 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:16,558 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-12-14 13:23:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:23:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.782608695652174) internal successors, (128), 46 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-12-14 13:23:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:16,558 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:23:16,558 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 13:23:16,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=915, Invalid=4937, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:23:16,559 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 389 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:16,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 129 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:23:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 13:23:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-12-14 13:23:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-12-14 13:23:16,560 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2022-12-14 13:23:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:16,560 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-12-14 13:23:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.782608695652174) internal successors, (128), 46 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-12-14 13:23:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 13:23:16,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:16,561 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2022-12-14 13:23:16,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:23:16,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 13:23:16,762 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:23:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash -43483305, now seen corresponding path program 16 times [2022-12-14 13:23:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:16,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424913023] [2022-12-14 13:23:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:16,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:18,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424913023] [2022-12-14 13:23:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424913023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419577873] [2022-12-14 13:23:18,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:23:18,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:18,326 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:18,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 13:23:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 160 conjunts are in the unsatisfiable core [2022-12-14 13:23:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:18,469 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 10 treesize of output 8 [2022-12-14 13:23:18,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:19,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:23:19,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:23:19,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:23:19,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:23:19,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:23:19,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:23:19,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:23:19,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:23:19,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:23:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:19,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:19,501 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1179 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1179) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:23:19,595 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1179 (Array Int Int)) (v_ArrVal_1178 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1178) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1179) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:23:27,650 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1179 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1179) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:23:31,941 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1179 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1179) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:23:40,896 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1179 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1179) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:23:45,411 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1179 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1179) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src#1.offset| 8)) 0)) is different from false [2022-12-14 13:23:45,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:23:45,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:23:45,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:23:45,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:23:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 90 not checked. [2022-12-14 13:23:45,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419577873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:45,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990424441] [2022-12-14 13:23:45,615 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:23:45,615 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:23:45,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:23:45,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:23:45,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:23:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:45,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:23:45,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:23:45,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:45,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:45,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:45,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:45,815 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:23:45,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:23:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:45,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:45,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:45,940 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:23:45,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:23:46,016 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:23:46,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:23:46,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:23:49,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9029#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:23:49,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:23:49,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:23:49,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32, 32] total 79 [2022-12-14 13:23:49,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713548035] [2022-12-14 13:23:49,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:23:49,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-14 13:23:49,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:49,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-14 13:23:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6334, Unknown=205, NotChecked=1002, Total=7832 [2022-12-14 13:23:49,168 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 80 states, 80 states have (on average 1.9125) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:52,257 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2022-12-14 13:23:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 13:23:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9125) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-14 13:23:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:52,258 INFO L225 Difference]: With dead ends: 117 [2022-12-14 13:23:52,258 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 13:23:52,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 141 SyntacticMatches, 15 SemanticMatches, 117 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 3351 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=616, Invalid=11859, Unknown=205, NotChecked=1362, Total=14042 [2022-12-14 13:23:52,259 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 29 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:52,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 447 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2482 Invalid, 22 Unknown, 400 Unchecked, 1.2s Time] [2022-12-14 13:23:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 13:23:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-12-14 13:23:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-12-14 13:23:52,260 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2022-12-14 13:23:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:52,260 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-12-14 13:23:52,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9125) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-12-14 13:23:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 13:23:52,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:52,261 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2022-12-14 13:23:52,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 13:23:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:52,462 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:23:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2074576259, now seen corresponding path program 17 times [2022-12-14 13:23:52,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237809230] [2022-12-14 13:23:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:23:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 49 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:53,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:23:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237809230] [2022-12-14 13:23:53,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237809230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:23:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586933519] [2022-12-14 13:23:53,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:23:53,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:23:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:23:53,142 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:23:53,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 13:23:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 13:23:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:23:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 13:23:53,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:23:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:23:54,945 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 7 treesize of output 5 [2022-12-14 13:23:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:23:55,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586933519] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:23:55,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567336567] [2022-12-14 13:23:55,110 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:23:55,110 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:23:55,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:23:55,110 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:23:55,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:23:55,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:55,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:23:55,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:55,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:55,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:55,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:23:55,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:55,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:55,406 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:23:55,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:23:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:55,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:23:55,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:55,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:23:55,535 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:23:55,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:23:55,605 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:23:55,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:23:55,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:23:57,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9758#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:23:57,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:23:57,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:23:57,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 59 [2022-12-14 13:23:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272533421] [2022-12-14 13:23:57,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:23:57,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 13:23:57,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:23:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 13:23:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=4292, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:23:57,901 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 61 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:23:58,857 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-12-14 13:23:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 13:23:58,858 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 13:23:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:23:58,858 INFO L225 Difference]: With dead ends: 77 [2022-12-14 13:23:58,858 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 13:23:58,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 141 SyntacticMatches, 19 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3185 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1417, Invalid=7139, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 13:23:58,859 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 576 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:23:58,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 109 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:23:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 13:23:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-12-14 13:23:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-14 13:23:58,860 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2022-12-14 13:23:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:23:58,860 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-14 13:23:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:23:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-14 13:23:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:23:58,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:23:58,861 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2022-12-14 13:23:58,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 13:23:59,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 13:23:59,062 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:23:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:23:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2010652257, now seen corresponding path program 18 times [2022-12-14 13:23:59,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:23:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768191029] [2022-12-14 13:23:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:23:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:23:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:00,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:24:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768191029] [2022-12-14 13:24:00,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768191029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:24:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491391886] [2022-12-14 13:24:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:24:00,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:24:00,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:24:00,990 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:24:00,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 13:24:01,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:24:01,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 175 conjunts are in the unsatisfiable core [2022-12-14 13:24:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:01,591 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 10 treesize of output 8 [2022-12-14 13:24:02,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:02,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:24:02,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:02,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:24:02,668 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 [2022-12-14 13:24:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:02,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:02,682 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:24:02,805 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int)) (v_ArrVal_1367 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1367) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:24:02,922 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int)) (v_ArrVal_1366 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1366) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:24:02,929 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:24:09,363 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:24:23,967 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int)) (v_ArrVal_1362 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1362) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:24:23,974 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:24:28,805 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:24:28,813 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int)) (v_ArrVal_1360 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1360) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:24:28,820 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:24:28,824 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1368 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1368) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:24:28,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:24:28,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:24:28,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:24:28,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:24:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 161 not checked. [2022-12-14 13:24:29,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491391886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:29,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215524865] [2022-12-14 13:24:29,060 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:24:29,060 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:24:29,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:24:29,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:24:29,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:24:29,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:29,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:24:29,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:24:29,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:29,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:29,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:29,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:29,264 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:24:29,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:24:29,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:29,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:29,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:29,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:29,375 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:24:29,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 52 treesize of output 54 [2022-12-14 13:24:29,464 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:24:29,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:24:29,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:24:32,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10491#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:24:32,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:24:32,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:24:32,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 35, 35] total 87 [2022-12-14 13:24:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906731026] [2022-12-14 13:24:32,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:24:32,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-12-14 13:24:32,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:24:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-12-14 13:24:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=6900, Unknown=149, NotChecked=1958, Total=9312 [2022-12-14 13:24:32,536 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 88 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 87 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:36,544 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2022-12-14 13:24:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 13:24:36,545 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 87 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-14 13:24:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:36,545 INFO L225 Difference]: With dead ends: 129 [2022-12-14 13:24:36,545 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 13:24:36,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 157 SyntacticMatches, 17 SemanticMatches, 130 ConstructedPredicates, 11 IntricatePredicates, 2 DeprecatedPredicates, 3800 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=688, Invalid=13726, Unknown=150, NotChecked=2728, Total=17292 [2022-12-14 13:24:36,546 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 32 mSolverCounterUnsat, 37 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 37 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:36,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 474 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2596 Invalid, 37 Unknown, 756 Unchecked, 1.4s Time] [2022-12-14 13:24:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 13:24:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-12-14 13:24:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-12-14 13:24:36,547 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-12-14 13:24:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:36,548 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-12-14 13:24:36,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 87 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-12-14 13:24:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 13:24:36,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:36,548 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 13:24:36,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 13:24:36,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 13:24:36,749 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:24:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1992937971, now seen corresponding path program 19 times [2022-12-14 13:24:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:24:36,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031081023] [2022-12-14 13:24:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:36,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:24:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 64 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:37,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:24:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031081023] [2022-12-14 13:24:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031081023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:24:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95342325] [2022-12-14 13:24:37,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:24:37,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:24:37,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:24:37,612 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:24:37,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 13:24:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 13:24:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:38,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:38,710 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 5 treesize of output 3 [2022-12-14 13:24:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95342325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:24:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612417006] [2022-12-14 13:24:38,953 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:24:38,953 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:24:38,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:24:38,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:24:38,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:24:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:38,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:24:38,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:24:39,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:39,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:39,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:24:39,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:39,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:39,143 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:24:39,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:24:39,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:24:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:39,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:39,259 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:24:39,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:24:39,359 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:24:39,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:24:39,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:24:41,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11286#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:24:41,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:24:41,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:24:41,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 53 [2022-12-14 13:24:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187713991] [2022-12-14 13:24:41,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:24:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 13:24:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:24:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 13:24:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3657, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 13:24:41,108 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 55 states, 54 states have (on average 2.888888888888889) internal successors, (156), 54 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:24:42,442 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-12-14 13:24:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 13:24:42,443 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.888888888888889) internal successors, (156), 54 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-12-14 13:24:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:24:42,443 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:24:42,443 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 13:24:42,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 178 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1251, Invalid=6581, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 13:24:42,444 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 275 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:24:42,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 186 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:24:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 13:24:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-12-14 13:24:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-12-14 13:24:42,445 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2022-12-14 13:24:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:24:42,445 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-12-14 13:24:42,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.888888888888889) internal successors, (156), 54 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:24:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-12-14 13:24:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 13:24:42,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:24:42,446 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 13:24:42,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 13:24:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:24:42,647 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:24:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:24:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1582048465, now seen corresponding path program 20 times [2022-12-14 13:24:42,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:24:42,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262372037] [2022-12-14 13:24:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:24:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:24:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:24:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:44,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:24:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262372037] [2022-12-14 13:24:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262372037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:24:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840277718] [2022-12-14 13:24:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:24:44,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:24:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:24:44,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:24:44,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 13:24:46,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 13:24:46,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:24:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 251 conjunts are in the unsatisfiable core [2022-12-14 13:24:46,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:24:46,282 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 10 treesize of output 8 [2022-12-14 13:24:47,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:24:47,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:47,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:47,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:47,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:48,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:48,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:48,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:48,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:48,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:49,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:24:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:24:49,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:24:49,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:24:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:24:49,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:24:53,691 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1574 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:24:53,699 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1574 (Array Int Int)) (v_ArrVal_1572 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1572) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:25:02,096 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1574 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:25:11,078 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1574 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:25:11,085 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int)) (v_ArrVal_1574 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:25:11,092 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1574 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:25:15,922 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1566 (Array Int Int)) (v_ArrVal_1574 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1566) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1574) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:25:15,971 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1565 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1565) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:25:16,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:25:16,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:25:16,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:25:16,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:25:16,224 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 7 treesize of output 3 [2022-12-14 13:25:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 166 not checked. [2022-12-14 13:25:17,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840277718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:25:17,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153889641] [2022-12-14 13:25:17,034 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:25:17,034 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:25:17,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:25:17,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:25:17,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:25:17,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:17,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:25:17,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:25:17,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:17,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:17,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:17,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:17,243 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:25:17,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:25:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:17,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:17,354 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:25:17,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:25:17,424 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:25:17,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:25:17,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:25:21,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12109#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:25:21,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:25:21,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:25:21,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38, 38] total 117 [2022-12-14 13:25:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946400288] [2022-12-14 13:25:21,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:25:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-14 13:25:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:25:21,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-14 13:25:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=13427, Unknown=213, NotChecked=1928, Total=16002 [2022-12-14 13:25:21,180 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 118 states, 118 states have (on average 1.923728813559322) internal successors, (227), 117 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:26,089 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2022-12-14 13:25:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 13:25:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.923728813559322) internal successors, (227), 117 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-12-14 13:25:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:26,091 INFO L225 Difference]: With dead ends: 141 [2022-12-14 13:25:26,091 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 13:25:26,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 152 SyntacticMatches, 19 SemanticMatches, 153 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 7591 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=704, Invalid=20576, Unknown=214, NotChecked=2376, Total=23870 [2022-12-14 13:25:26,092 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 3548 mSolverCounterSat, 35 mSolverCounterUnsat, 62 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3548 IncrementalHoareTripleChecker+Invalid, 62 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:26,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 623 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3548 Invalid, 62 Unknown, 654 Unchecked, 2.0s Time] [2022-12-14 13:25:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 13:25:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-12-14 13:25:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-12-14 13:25:26,093 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2022-12-14 13:25:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:26,093 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-12-14 13:25:26,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.923728813559322) internal successors, (227), 117 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-12-14 13:25:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 13:25:26,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:26,094 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2022-12-14 13:25:26,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 13:25:26,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 13:25:26,295 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:25:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1541842011, now seen corresponding path program 21 times [2022-12-14 13:25:26,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:25:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861915290] [2022-12-14 13:25:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:25:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:25:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:25:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 81 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:25:27,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:25:27,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861915290] [2022-12-14 13:25:27,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861915290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:25:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543914741] [2022-12-14 13:25:27,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:25:27,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:25:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:25:27,449 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:25:27,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:25:28,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:25:28,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:25:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-14 13:25:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:28,390 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:25:28,391 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:25:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:25:28,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:25:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:25:29,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543914741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:25:29,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486912439] [2022-12-14 13:25:29,830 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:25:29,830 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:25:29,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:25:29,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:25:29,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:25:29,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:29,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:25:29,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:29,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:29,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:29,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:30,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:30,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:30,027 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:25:30,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:25:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:30,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:30,144 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:25:30,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:25:30,215 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:25:30,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:25:30,291 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:25:33,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12967#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:25:33,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:25:33,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:25:33,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 67 [2022-12-14 13:25:33,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266499371] [2022-12-14 13:25:33,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:25:33,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 13:25:33,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:25:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 13:25:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=5356, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 13:25:33,242 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 69 states, 68 states have (on average 2.8529411764705883) internal successors, (194), 68 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:25:34,613 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-12-14 13:25:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 13:25:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.8529411764705883) internal successors, (194), 68 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-12-14 13:25:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:25:34,615 INFO L225 Difference]: With dead ends: 91 [2022-12-14 13:25:34,615 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 13:25:34,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 187 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3378 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1984, Invalid=8936, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 13:25:34,615 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 435 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:25:34,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 184 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:25:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 13:25:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-12-14 13:25:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-12-14 13:25:34,617 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2022-12-14 13:25:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:25:34,617 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-12-14 13:25:34,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.8529411764705883) internal successors, (194), 68 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:25:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-12-14 13:25:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 13:25:34,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:25:34,618 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2022-12-14 13:25:34,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 13:25:34,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 13:25:34,819 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:25:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:25:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1723708985, now seen corresponding path program 22 times [2022-12-14 13:25:34,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:25:34,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316941917] [2022-12-14 13:25:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:25:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:25:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:25:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:25:37,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:25:37,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316941917] [2022-12-14 13:25:37,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316941917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:25:37,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400603627] [2022-12-14 13:25:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:25:37,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:25:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:25:37,371 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:25:37,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 13:25:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:25:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 203 conjunts are in the unsatisfiable core [2022-12-14 13:25:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:25:37,549 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 10 treesize of output 8 [2022-12-14 13:25:38,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:38,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:25:38,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:38,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:38,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:38,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:38,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:38,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:38,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:39,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:39,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:25:39,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:25:39,139 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 [2022-12-14 13:25:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:25:39,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:25:39,152 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1798 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1798) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:25:39,262 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1798 (Array Int Int)) (v_ArrVal_1797 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1797) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1798) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:25:54,351 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_1789 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1789) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:25:54,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:25:54,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:25:54,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:25:54,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:25:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 60 not checked. [2022-12-14 13:25:55,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400603627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:25:55,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061428043] [2022-12-14 13:25:55,048 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:25:55,048 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:25:55,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:25:55,048 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:25:55,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:25:55,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:55,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:25:55,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:25:55,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:55,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:55,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:25:55,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:55,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:55,261 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:25:55,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:25:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:55,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:25:55,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:55,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:25:55,366 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:25:55,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:25:55,447 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:25:55,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:25:55,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:25:59,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13829#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:25:59,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:25:59,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:25:59,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 41, 41] total 96 [2022-12-14 13:25:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193685524] [2022-12-14 13:25:59,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:25:59,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 13:25:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:25:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 13:25:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=9931, Unknown=238, NotChecked=612, Total=11130 [2022-12-14 13:25:59,231 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 97 states, 97 states have (on average 1.958762886597938) internal successors, (190), 96 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:03,383 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2022-12-14 13:26:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 13:26:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.958762886597938) internal successors, (190), 96 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-12-14 13:26:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:03,384 INFO L225 Difference]: With dead ends: 153 [2022-12-14 13:26:03,384 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 13:26:03,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 189 SyntacticMatches, 23 SemanticMatches, 144 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 5610 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=779, Invalid=19297, Unknown=242, NotChecked=852, Total=21170 [2022-12-14 13:26:03,385 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 202 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 44 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:03,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 644 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3833 Invalid, 4 Unknown, 273 Unchecked, 1.7s Time] [2022-12-14 13:26:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 13:26:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-12-14 13:26:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-12-14 13:26:03,386 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-12-14 13:26:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:03,386 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-12-14 13:26:03,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.958762886597938) internal successors, (190), 96 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-12-14 13:26:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 13:26:03,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:03,387 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2022-12-14 13:26:03,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 13:26:03,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 13:26:03,588 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:26:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 163518235, now seen corresponding path program 23 times [2022-12-14 13:26:03,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:26:03,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80178762] [2022-12-14 13:26:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:26:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 100 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:04,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:26:04,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80178762] [2022-12-14 13:26:04,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80178762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:26:04,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934105538] [2022-12-14 13:26:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:26:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:04,762 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 13:26:09,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 13:26:09,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:26:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 13:26:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:09,176 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:26:09,176 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:26:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:10,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934105538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998872682] [2022-12-14 13:26:11,439 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:26:11,439 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:26:11,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:26:11,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:26:11,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:26:11,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:11,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:26:11,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:11,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:11,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:11,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:11,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:11,660 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:26:11,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:26:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:11,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:11,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:11,779 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:26:11,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 52 treesize of output 54 [2022-12-14 13:26:11,858 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:26:11,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:26:11,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:26:14,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14787#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:26:14,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:26:14,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:26:14,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-12-14 13:26:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665620853] [2022-12-14 13:26:14,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-12-14 13:26:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:26:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-12-14 13:26:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=8415, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 13:26:14,941 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 89 states, 88 states have (on average 3.0681818181818183) internal successors, (270), 88 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:16,603 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-12-14 13:26:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:26:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 3.0681818181818183) internal successors, (270), 88 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-12-14 13:26:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:16,603 INFO L225 Difference]: With dead ends: 98 [2022-12-14 13:26:16,603 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 13:26:16,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 189 SyntacticMatches, 12 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5647 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2842, Invalid=13160, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 13:26:16,604 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 803 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:16,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 173 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:26:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 13:26:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-12-14 13:26:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-12-14 13:26:16,606 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2022-12-14 13:26:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:16,606 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-12-14 13:26:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 3.0681818181818183) internal successors, (270), 88 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-12-14 13:26:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 13:26:16,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:16,606 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2022-12-14 13:26:16,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 13:26:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:16,808 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:26:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:16,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1568436473, now seen corresponding path program 24 times [2022-12-14 13:26:16,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:26:16,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661043969] [2022-12-14 13:26:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:16,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:26:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:19,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:26:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661043969] [2022-12-14 13:26:19,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661043969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:26:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661138744] [2022-12-14 13:26:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:26:19,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:19,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:19,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:26:20,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:26:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:26:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 224 conjunts are in the unsatisfiable core [2022-12-14 13:26:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:20,821 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 10 treesize of output 8 [2022-12-14 13:26:21,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:21,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:26:21,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:21,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:21,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:22,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:26:22,563 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 [2022-12-14 13:26:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:22,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:22,671 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2040 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2040) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:26:22,678 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2039 (Array Int Int)) (v_ArrVal_2040 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2039) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2040) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:26:22,683 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2040 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2040) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:26:27,297 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int)) (v_ArrVal_2040 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2040) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:26:27,369 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2036 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2036) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0))) is different from false [2022-12-14 13:26:27,443 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2035 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2035) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:26:28,166 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2031 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2031) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:26:28,424 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2029 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2029) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0))) is different from false [2022-12-14 13:26:28,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:26:28,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:26:28,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:26:28,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:26:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 181 not checked. [2022-12-14 13:26:28,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661138744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:28,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803088157] [2022-12-14 13:26:28,925 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:26:28,925 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:26:28,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:26:28,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:26:28,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:26:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:28,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:26:28,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:26:29,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:29,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:29,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:29,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:29,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:29,137 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:26:29,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:26:29,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:29,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:29,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:29,258 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:26:29,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:26:29,322 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:26:29,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:26:29,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:26:33,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15718#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:26:33,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:26:33,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:26:33,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 44, 44] total 105 [2022-12-14 13:26:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484964258] [2022-12-14 13:26:33,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-12-14 13:26:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:26:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-12-14 13:26:33,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=10808, Unknown=203, NotChecked=1736, Total=13110 [2022-12-14 13:26:33,302 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:37,698 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2022-12-14 13:26:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 13:26:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-12-14 13:26:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:37,699 INFO L225 Difference]: With dead ends: 165 [2022-12-14 13:26:37,699 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 13:26:37,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 202 SyntacticMatches, 30 SemanticMatches, 155 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 6442 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=802, Invalid=21077, Unknown=205, NotChecked=2408, Total=24492 [2022-12-14 13:26:37,700 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 285 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 4008 mSolverCounterSat, 44 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4008 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:37,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 691 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4008 Invalid, 15 Unknown, 756 Unchecked, 1.5s Time] [2022-12-14 13:26:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 13:26:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-12-14 13:26:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-12-14 13:26:37,702 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2022-12-14 13:26:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:37,702 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-12-14 13:26:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-12-14 13:26:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 13:26:37,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:37,702 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2022-12-14 13:26:37,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:26:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:37,903 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:26:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1431886643, now seen corresponding path program 25 times [2022-12-14 13:26:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:26:37,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681875394] [2022-12-14 13:26:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:26:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 121 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:38,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:26:38,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681875394] [2022-12-14 13:26:38,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681875394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:26:38,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938508921] [2022-12-14 13:26:38,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:26:38,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:38,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:38,987 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:38,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 13:26:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 135 conjunts are in the unsatisfiable core [2022-12-14 13:26:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:39,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:40,355 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 5 treesize of output 3 [2022-12-14 13:26:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:40,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938508921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:26:40,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713492046] [2022-12-14 13:26:40,671 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:26:40,671 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:26:40,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:26:40,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:26:40,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:26:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:26:40,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:26:40,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:40,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:40,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:26:40,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:40,894 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:26:40,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:26:40,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:26:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:40,993 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:26:40,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 52 treesize of output 54 [2022-12-14 13:26:41,099 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:26:41,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:26:41,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:26:42,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16723#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:26:42,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:26:42,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:26:42,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 65 [2022-12-14 13:26:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736711628] [2022-12-14 13:26:42,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:26:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 13:26:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:26:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 13:26:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=5160, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 13:26:42,831 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 67 states, 66 states have (on average 3.0) internal successors, (198), 66 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:26:44,278 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-12-14 13:26:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 13:26:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.0) internal successors, (198), 66 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-12-14 13:26:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:26:44,279 INFO L225 Difference]: With dead ends: 105 [2022-12-14 13:26:44,279 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 13:26:44,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 232 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1860, Invalid=9482, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 13:26:44,280 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 498 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:26:44,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 270 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:26:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 13:26:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-12-14 13:26:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-12-14 13:26:44,281 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 97 [2022-12-14 13:26:44,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:26:44,281 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-12-14 13:26:44,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.0) internal successors, (198), 66 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:26:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-12-14 13:26:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 13:26:44,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:26:44,282 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2022-12-14 13:26:44,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 13:26:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-14 13:26:44,483 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:26:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:26:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1297652207, now seen corresponding path program 26 times [2022-12-14 13:26:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:26:44,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256901153] [2022-12-14 13:26:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:26:44,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:26:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:26:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:47,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:26:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256901153] [2022-12-14 13:26:47,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256901153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:26:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331309817] [2022-12-14 13:26:47,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:26:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:26:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:26:47,449 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:26:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 13:26:54,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 13:26:54,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:26:54,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 308 conjunts are in the unsatisfiable core [2022-12-14 13:26:54,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:26:54,525 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 10 treesize of output 8 [2022-12-14 13:26:55,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:26:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:55,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:56,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:56,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:56,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:56,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:57,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:57,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:57,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:57,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:58,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:58,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:26:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:26:58,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:26:58,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:26:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:26:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:26:58,728 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int)) (v_ArrVal_2296 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2296) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:26:58,735 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:05,028 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:05,035 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int)) (v_ArrVal_2294 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2294) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:05,042 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:27:05,049 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int)) (v_ArrVal_2293 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2293) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:27:05,055 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:09,516 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2291 (Array Int Int)) (v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2291) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:09,523 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:13,953 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2289 (Array Int Int)) (v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2289) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:27:13,959 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:13,966 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2288 (Array Int Int)) (v_ArrVal_2297 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2288) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2297) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:14,221 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2286 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2286) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:27:14,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:27:14,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:27:14,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:27:14,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:27:14,700 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 7 treesize of output 3 [2022-12-14 13:27:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 323 not checked. [2022-12-14 13:27:15,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331309817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:15,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283250588] [2022-12-14 13:27:15,790 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:27:15,790 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:27:15,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:27:15,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:27:15,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:27:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:15,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:27:15,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:15,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:15,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:15,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:15,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:16,004 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:27:16,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:27:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:16,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:16,130 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:27:16,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:27:16,201 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:27:16,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:27:16,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:27:20,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17754#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:27:20,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:27:20,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:27:20,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 47, 47] total 145 [2022-12-14 13:27:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637026250] [2022-12-14 13:27:20,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-12-14 13:27:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-12-14 13:27:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=19294, Unknown=265, NotChecked=3796, Total=23870 [2022-12-14 13:27:20,839 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 146 states, 146 states have (on average 1.9589041095890412) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:29,331 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2022-12-14 13:27:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 13:27:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9589041095890412) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-12-14 13:27:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:29,332 INFO L225 Difference]: With dead ends: 177 [2022-12-14 13:27:29,332 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 13:27:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 194 SyntacticMatches, 22 SemanticMatches, 202 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=1129, Invalid=34942, Unknown=271, NotChecked=5070, Total=41412 [2022-12-14 13:27:29,334 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 5534 mSolverCounterSat, 40 mSolverCounterUnsat, 242 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 6855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5534 IncrementalHoareTripleChecker+Invalid, 242 IncrementalHoareTripleChecker+Unknown, 1039 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:29,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 978 Invalid, 6855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5534 Invalid, 242 Unknown, 1039 Unchecked, 3.4s Time] [2022-12-14 13:27:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 13:27:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-12-14 13:27:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-12-14 13:27:29,336 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2022-12-14 13:27:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:29,336 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-12-14 13:27:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9589041095890412) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-12-14 13:27:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 13:27:29,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:29,337 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2022-12-14 13:27:29,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-14 13:27:29,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 13:27:29,538 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:27:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1693025347, now seen corresponding path program 27 times [2022-12-14 13:27:29,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:29,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140276765] [2022-12-14 13:27:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 144 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:30,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:30,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140276765] [2022-12-14 13:27:30,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140276765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:27:30,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376143838] [2022-12-14 13:27:30,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:27:30,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:30,823 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:30,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:27:32,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:27:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:27:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 150 conjunts are in the unsatisfiable core [2022-12-14 13:27:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:32,420 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:27:32,420 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:27:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 169 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:33,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 169 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:34,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376143838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:34,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1843333293] [2022-12-14 13:27:34,479 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:27:34,480 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:27:34,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:27:34,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:27:34,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:27:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:34,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:27:34,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:27:34,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:34,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:34,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:34,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:34,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:34,704 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:27:34,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:27:34,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:34,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:34,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:34,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:34,828 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:27:34,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:27:34,913 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:27:34,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:27:34,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:27:39,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18850#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:27:39,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:27:39,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:27:39,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 82 [2022-12-14 13:27:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796124917] [2022-12-14 13:27:39,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:39,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-14 13:27:39,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-14 13:27:39,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=7606, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 13:27:39,067 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 84 states, 83 states have (on average 2.9156626506024095) internal successors, (242), 83 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:27:40,661 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-12-14 13:27:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 13:27:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 2.9156626506024095) internal successors, (242), 83 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-12-14 13:27:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:27:40,662 INFO L225 Difference]: With dead ends: 112 [2022-12-14 13:27:40,662 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 13:27:40,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 238 SyntacticMatches, 14 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5031 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2929, Invalid=12821, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 13:27:40,663 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 693 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:27:40,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 277 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:27:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 13:27:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-12-14 13:27:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-12-14 13:27:40,664 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2022-12-14 13:27:40,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:27:40,664 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-12-14 13:27:40,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 2.9156626506024095) internal successors, (242), 83 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:27:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-12-14 13:27:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 13:27:40,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:27:40,665 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2022-12-14 13:27:40,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 13:27:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:40,866 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:27:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:27:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -166257953, now seen corresponding path program 28 times [2022-12-14 13:27:40,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:27:40,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666389525] [2022-12-14 13:27:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:27:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:27:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 44 proven. 707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:44,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:27:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666389525] [2022-12-14 13:27:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666389525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:27:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007514133] [2022-12-14 13:27:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:27:44,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:27:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:27:44,934 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:27:44,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 13:27:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:27:45,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 250 conjunts are in the unsatisfiable core [2022-12-14 13:27:45,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:27:45,125 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 10 treesize of output 8 [2022-12-14 13:27:46,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:46,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:27:46,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:46,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:46,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:46,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:46,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:46,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:46,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:47,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:47,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:47,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:47,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:47,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:27:47,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:27:47,476 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 [2022-12-14 13:27:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 44 proven. 707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:27:47,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:27:47,489 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2573 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2573) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|))) is different from false [2022-12-14 13:27:47,495 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2573 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2573) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2022-12-14 13:27:47,504 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2573 (Array Int Int)) (v_ArrVal_2572 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2572) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2573) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:27:47,659 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2573 (Array Int Int)) (v_ArrVal_2571 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2571) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2573) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:27:47,665 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2573 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2573) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)))) is different from false [2022-12-14 13:27:48,289 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2568 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2568) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:27:48,386 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2567 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2567) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:27:49,509 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2562 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2562) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0))) is different from false [2022-12-14 13:27:49,809 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2560 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2560) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:27:49,981 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2560 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2560) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:27:49,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:27:49,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:27:49,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:27:49,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:27:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 44 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 233 not checked. [2022-12-14 13:27:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007514133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:27:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301933375] [2022-12-14 13:27:50,378 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:27:50,378 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:27:50,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:27:50,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:27:50,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:27:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:50,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:27:50,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:50,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:50,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:50,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:27:50,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:50,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:50,607 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:27:50,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:27:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:50,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:27:50,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:27:50,707 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:27:50,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:27:50,798 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:27:50,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:27:50,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:27:56,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19913#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:27:56,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:27:56,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:27:56,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 50, 50] total 117 [2022-12-14 13:27:56,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210778630] [2022-12-14 13:27:56,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:27:56,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-14 13:27:56,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:27:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-14 13:27:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=13023, Unknown=193, NotChecked=2390, Total=16002 [2022-12-14 13:27:56,302 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 117 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:02,122 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2022-12-14 13:28:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 13:28:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 117 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-12-14 13:28:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:02,123 INFO L225 Difference]: With dead ends: 189 [2022-12-14 13:28:02,123 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 13:28:02,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 236 SyntacticMatches, 35 SemanticMatches, 167 ConstructedPredicates, 10 IntricatePredicates, 3 DeprecatedPredicates, 7412 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=787, Invalid=24178, Unknown=197, NotChecked=3230, Total=28392 [2022-12-14 13:28:02,124 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 5603 mSolverCounterSat, 46 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 6733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5603 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 1052 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:02,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 980 Invalid, 6733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5603 Invalid, 32 Unknown, 1052 Unchecked, 2.4s Time] [2022-12-14 13:28:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 13:28:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-12-14 13:28:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-12-14 13:28:02,126 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2022-12-14 13:28:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:02,126 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-12-14 13:28:02,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 117 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-12-14 13:28:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 13:28:02,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:02,127 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2022-12-14 13:28:02,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 13:28:02,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-14 13:28:02,327 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:28:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:02,328 INFO L85 PathProgramCache]: Analyzing trace with hash 627943947, now seen corresponding path program 29 times [2022-12-14 13:28:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:02,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427448111] [2022-12-14 13:28:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:02,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 169 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:03,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427448111] [2022-12-14 13:28:03,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427448111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:28:03,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650834442] [2022-12-14 13:28:03,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:28:03,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:03,846 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:03,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 13:28:16,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 13:28:16,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 13:28:16,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 196 proven. 584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:17,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:18,660 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 7 treesize of output 5 [2022-12-14 13:28:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 196 proven. 584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:19,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650834442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:28:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794946286] [2022-12-14 13:28:19,102 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:28:19,102 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:28:19,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:28:19,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:28:19,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:28:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:19,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:28:19,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:28:19,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:28:19,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:28:19,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:28:19,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:19,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:19,294 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:28:19,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:28:19,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:19,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:28:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:19,409 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:28:19,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:28:19,498 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:28:19,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:28:19,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:28:21,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21065#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:28:21,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:28:21,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:28:21,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 89 [2022-12-14 13:28:21,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701203359] [2022-12-14 13:28:21,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:28:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 13:28:21,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:28:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 13:28:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=8702, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:28:21,549 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 91 states, 90 states have (on average 3.3444444444444446) internal successors, (301), 90 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:28:23,550 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2022-12-14 13:28:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 13:28:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 3.3444444444444446) internal successors, (301), 90 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-12-14 13:28:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:28:23,550 INFO L225 Difference]: With dead ends: 119 [2022-12-14 13:28:23,550 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 13:28:23,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 252 SyntacticMatches, 16 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5915 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3175, Invalid=14915, Unknown=0, NotChecked=0, Total=18090 [2022-12-14 13:28:23,552 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 592 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:28:23,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 235 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:28:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 13:28:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-12-14 13:28:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-12-14 13:28:23,553 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2022-12-14 13:28:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:28:23,553 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-12-14 13:28:23,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 3.3444444444444446) internal successors, (301), 90 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:28:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-12-14 13:28:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 13:28:23,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:28:23,554 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2022-12-14 13:28:23,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 13:28:23,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 13:28:23,755 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:28:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:28:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1621840407, now seen corresponding path program 30 times [2022-12-14 13:28:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:28:23,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229695442] [2022-12-14 13:28:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:28:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:28:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:28:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 47 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:27,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:28:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229695442] [2022-12-14 13:28:27,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229695442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:28:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467952947] [2022-12-14 13:28:27,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:28:27,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:28:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:28:27,639 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:28:27,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 13:28:29,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:28:29,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:28:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 337 conjunts are in the unsatisfiable core [2022-12-14 13:28:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:28:29,948 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 10 treesize of output 8 [2022-12-14 13:28:31,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:28:31,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:31,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:32,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:32,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:32,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:32,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:33,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:33,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:33,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:33,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:34,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:34,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:34,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:35,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:35,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:28:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:28:35,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:28:35,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:28:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 47 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:28:35,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:28:35,696 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:28:40,869 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int)) (v_ArrVal_2862 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2862) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:28:47,349 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:28:53,707 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:29:02,032 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2858 (Array Int Int)) (v_ArrVal_2864 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2858) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:29:02,040 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:29:08,491 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:29:08,500 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2856 (Array Int Int)) (v_ArrVal_2864 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2856) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2022-12-14 13:29:08,507 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:29:08,516 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2855 (Array Int Int)) (v_ArrVal_2864 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2855) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)))) is different from false [2022-12-14 13:29:08,523 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2022-12-14 13:29:13,410 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2022-12-14 13:29:13,420 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2853 (Array Int Int)) (v_ArrVal_2864 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2853) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2022-12-14 13:29:18,286 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2022-12-14 13:29:18,294 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int)) (v_ArrVal_2851 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2851) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2022-12-14 13:29:18,301 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:29:25,343 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2864 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2864) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:29:25,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:25,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:29:25,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:29:25,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:29:25,356 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 7 treesize of output 3 [2022-12-14 13:29:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 47 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 455 not checked. [2022-12-14 13:29:26,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467952947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:26,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944895580] [2022-12-14 13:29:26,720 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:29:26,720 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:26,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:26,721 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:26,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:26,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:29:26,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:26,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:29:26,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:29:26,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:29:26,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:26,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:26,906 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:29:26,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:29:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:26,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:26,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:27,016 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:29:27,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:29:27,093 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:27,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:29:27,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:33,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22239#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:33,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:33,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:33,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 53, 53] total 168 [2022-12-14 13:29:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626219258] [2022-12-14 13:29:33,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-12-14 13:29:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-12-14 13:29:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=24897, Unknown=337, NotChecked=5678, Total=31506 [2022-12-14 13:29:33,614 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 169 states, 169 states have (on average 1.9763313609467457) internal successors, (334), 168 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:42,705 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2022-12-14 13:29:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 13:29:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.9763313609467457) internal successors, (334), 168 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-12-14 13:29:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:42,706 INFO L225 Difference]: With dead ends: 201 [2022-12-14 13:29:42,706 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 13:29:42,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 222 SyntacticMatches, 31 SemanticMatches, 217 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 15099 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=1001, Invalid=39331, Unknown=338, NotChecked=7072, Total=47742 [2022-12-14 13:29:42,708 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 184 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 7266 mSolverCounterSat, 55 mSolverCounterUnsat, 118 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 9378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 7266 IncrementalHoareTripleChecker+Invalid, 118 IncrementalHoareTripleChecker+Unknown, 1939 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:42,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1307 Invalid, 9378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 7266 Invalid, 118 Unknown, 1939 Unchecked, 3.7s Time] [2022-12-14 13:29:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 13:29:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-12-14 13:29:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-12-14 13:29:42,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2022-12-14 13:29:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:42,710 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-12-14 13:29:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.9763313609467457) internal successors, (334), 168 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-12-14 13:29:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 13:29:42,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:42,710 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2022-12-14 13:29:42,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 13:29:42,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:42,912 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:29:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 123312491, now seen corresponding path program 31 times [2022-12-14 13:29:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:42,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945368704] [2022-12-14 13:29:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 196 proven. 692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:44,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:44,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945368704] [2022-12-14 13:29:44,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945368704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:44,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75698862] [2022-12-14 13:29:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:29:44,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:44,375 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:44,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 13:29:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 162 conjunts are in the unsatisfiable core [2022-12-14 13:29:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 225 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:29:46,266 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 5 treesize of output 3 [2022-12-14 13:29:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 225 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75698862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:29:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129865723] [2022-12-14 13:29:46,722 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:29:46,722 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:29:46,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:29:46,723 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:29:46,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:29:46,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:46,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:29:46,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:29:46,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:29:46,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:29:46,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:29:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:46,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:46,917 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:29:46,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:29:47,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:29:47,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:47,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:29:47,040 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:29:47,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:29:47,134 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:29:47,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:29:47,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:29:49,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23446#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:29:49,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:29:49,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:29:49,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 77 [2022-12-14 13:29:49,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317414162] [2022-12-14 13:29:49,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:29:49,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 13:29:49,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 13:29:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=6915, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 13:29:49,527 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 79 states, 78 states have (on average 3.076923076923077) internal successors, (240), 78 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:51,758 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2022-12-14 13:29:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 13:29:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.076923076923077) internal successors, (240), 78 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-12-14 13:29:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:51,759 INFO L225 Difference]: With dead ends: 126 [2022-12-14 13:29:51,759 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 13:29:51,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 286 SyntacticMatches, 17 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4627 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2595, Invalid=12905, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 13:29:51,761 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 967 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:51,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 376 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2835 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 13:29:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 13:29:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-12-14 13:29:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-12-14 13:29:51,763 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 118 [2022-12-14 13:29:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:51,763 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-12-14 13:29:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.076923076923077) internal successors, (240), 78 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:29:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-12-14 13:29:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 13:29:51,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:51,764 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2022-12-14 13:29:51,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-14 13:29:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-14 13:29:51,965 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:29:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1940782775, now seen corresponding path program 32 times [2022-12-14 13:29:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:51,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704330320] [2022-12-14 13:29:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 50 proven. 920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:56,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704330320] [2022-12-14 13:29:56,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704330320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038167332] [2022-12-14 13:29:56,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:29:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:56,650 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:56,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 13:30:24,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 13:30:24,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:30:24,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 369 conjunts are in the unsatisfiable core [2022-12-14 13:30:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:24,783 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 10 treesize of output 8 [2022-12-14 13:30:25,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 13:30:26,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:26,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:26,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:26,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:27,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:27,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:27,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:27,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:28,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:28,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:28,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:28,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:29,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:29,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:29,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:29,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:30:30,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:30,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:30,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 13:30:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 50 proven. 920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:30:30,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:36,703 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3172 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3172) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:30:36,711 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3170 (Array Int Int)) (v_ArrVal_3172 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3170) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3172) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:30:45,986 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3166 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3166) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:30:46,074 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3165 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3165) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:30:46,929 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3161 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3161) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-12-14 13:30:47,235 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3159 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3159) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0))) is different from false [2022-12-14 13:30:47,296 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3158 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3158) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:30:47,352 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3157 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3157) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15))))) is different from false [2022-12-14 13:30:47,535 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3157 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_3157) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-12-14 13:30:47,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:47,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:30:47,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:30:47,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:30:47,548 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 7 treesize of output 3 [2022-12-14 13:30:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 50 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 229 not checked. [2022-12-14 13:30:48,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038167332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:48,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903303324] [2022-12-14 13:30:48,977 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:30:48,977 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:48,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:48,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:48,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:48,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:30:49,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:30:49,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:30:49,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:30:49,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:30:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:49,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:49,182 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:30:49,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:30:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:49,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:49,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:30:49,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:30:49,299 INFO L321 Elim1Store]: treesize reduction 97, result has 15.7 percent of original size [2022-12-14 13:30:49,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 50 treesize of output 54 [2022-12-14 13:30:49,381 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:30:49,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:30:49,469 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:30:52,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24678#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:30:52,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:30:52,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:30:52,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 56, 56] total 166 [2022-12-14 13:30:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949352629] [2022-12-14 13:30:52,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:30:52,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-12-14 13:30:52,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-12-14 13:30:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=26837, Unknown=330, NotChecked=3042, Total=30800 [2022-12-14 13:30:52,374 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 167 states, 167 states have (on average 1.9820359281437125) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:01,418 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2022-12-14 13:31:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 13:31:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9820359281437125) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-12-14 13:31:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:01,418 INFO L225 Difference]: With dead ends: 213 [2022-12-14 13:31:01,419 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 13:31:01,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 253 SyntacticMatches, 15 SemanticMatches, 229 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 14751 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=1256, Invalid=47502, Unknown=340, NotChecked=4032, Total=53130 [2022-12-14 13:31:01,420 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 454 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 8834 mSolverCounterSat, 53 mSolverCounterUnsat, 139 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 10136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 8834 IncrementalHoareTripleChecker+Invalid, 139 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:01,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1506 Invalid, 10136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 8834 Invalid, 139 Unknown, 1110 Unchecked, 3.8s Time] [2022-12-14 13:31:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 13:31:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-12-14 13:31:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-12-14 13:31:01,422 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2022-12-14 13:31:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:01,422 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-12-14 13:31:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9820359281437125) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-12-14 13:31:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:31:01,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:01,423 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1] [2022-12-14 13:31:01,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 13:31:01,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 13:31:01,624 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:31:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash 378835171, now seen corresponding path program 33 times [2022-12-14 13:31:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600806558] [2022-12-14 13:31:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:01,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 225 proven. 778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:03,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:03,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600806558] [2022-12-14 13:31:03,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600806558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:03,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111707201] [2022-12-14 13:31:03,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:31:03,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:03,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:03,491 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:03,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 13:31:07,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:31:07,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:31:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 177 conjunts are in the unsatisfiable core [2022-12-14 13:31:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:07,062 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:31:07,063 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:31:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 256 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:07,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 256 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:09,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111707201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:31:09,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948123524] [2022-12-14 13:31:09,876 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:31:09,876 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:31:09,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:31:09,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:31:09,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:31:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:09,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:31:09,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:31:09,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:31:09,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:31:09,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:31:10,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:10,081 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:31:10,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:31:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:10,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:31:10,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:10,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:31:10,198 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:31:10,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:31:10,273 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:31:10,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:31:10,351 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:31:14,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25982#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:31:14,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:31:14,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:31:14,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 97 [2022-12-14 13:31:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807712120] [2022-12-14 13:31:14,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:31:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-14 13:31:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:31:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-14 13:31:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1313, Invalid=10243, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 13:31:14,454 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 99 states, 98 states have (on average 2.9591836734693877) internal successors, (290), 98 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:31:17,143 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-12-14 13:31:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 13:31:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 2.9591836734693877) internal successors, (290), 98 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-12-14 13:31:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:31:17,144 INFO L225 Difference]: With dead ends: 133 [2022-12-14 13:31:17,144 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 13:31:17,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 289 SyntacticMatches, 17 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7008 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=4063, Invalid=17399, Unknown=0, NotChecked=0, Total=21462 [2022-12-14 13:31:17,145 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1016 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:31:17,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 349 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:31:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 13:31:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-12-14 13:31:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-12-14 13:31:17,147 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 125 [2022-12-14 13:31:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:31:17,147 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-12-14 13:31:17,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 2.9591836734693877) internal successors, (290), 98 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:31:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-12-14 13:31:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 13:31:17,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:31:17,147 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2022-12-14 13:31:17,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-14 13:31:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:17,349 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:31:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:31:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash 578482751, now seen corresponding path program 34 times [2022-12-14 13:31:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:31:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511912576] [2022-12-14 13:31:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:31:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:31:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 53 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:22,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:31:22,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511912576] [2022-12-14 13:31:22,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511912576] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:31:22,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614900819] [2022-12-14 13:31:22,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:31:22,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:31:22,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:31:22,161 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:31:22,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 13:31:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:31:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 293 conjunts are in the unsatisfiable core [2022-12-14 13:31:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:31:22,411 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 10 treesize of output 8 [2022-12-14 13:31:23,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:31:23,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:31:24,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:24,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:31:25,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:31:25,556 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 [2022-12-14 13:31:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 53 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:31:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:31:25,901 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3497 (Array Int Int)) (v_ArrVal_3498 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3497) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3498) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-12-14 13:31:25,908 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3498 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3498) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:31:31,458 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3498 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3498) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:31:37,887 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3498 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3498) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:32:00,487 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3489 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3489) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:32:01,684 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3484 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3484) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:32:02,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:02,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:32:02,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:32:02,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:32:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 53 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 237 not checked. [2022-12-14 13:32:02,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614900819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:32:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579630819] [2022-12-14 13:32:02,821 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:32:02,821 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:32:02,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:32:02,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:32:02,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:32:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:02,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:32:02,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:32:02,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:32:02,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:32:02,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:32:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:02,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:02,997 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:32:02,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:32:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:32:03,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:03,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:32:03,102 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:32:03,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:32:03,189 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:32:03,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:32:03,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:05,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27249#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:32:05,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:32:05,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:32:05,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 59, 59] total 141 [2022-12-14 13:32:05,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292954383] [2022-12-14 13:32:05,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:32:05,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-12-14 13:32:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:32:05,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-12-14 13:32:05,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=19858, Unknown=554, NotChecked=1746, Total=22650 [2022-12-14 13:32:05,641 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 142 states, 142 states have (on average 2.0140845070422535) internal successors, (286), 141 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:32:14,251 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2022-12-14 13:32:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-14 13:32:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0140845070422535) internal successors, (286), 141 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-12-14 13:32:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:32:14,251 INFO L225 Difference]: With dead ends: 225 [2022-12-14 13:32:14,251 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 13:32:14,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 302 SyntacticMatches, 19 SemanticMatches, 202 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 9461 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=1017, Invalid=37456, Unknown=557, NotChecked=2382, Total=41412 [2022-12-14 13:32:14,253 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 171 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 8565 mSolverCounterSat, 64 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 9354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 8565 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:32:14,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1446 Invalid, 9354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 8565 Invalid, 5 Unknown, 720 Unchecked, 3.4s Time] [2022-12-14 13:32:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 13:32:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-12-14 13:32:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-12-14 13:32:14,255 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2022-12-14 13:32:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:32:14,255 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-12-14 13:32:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.0140845070422535) internal successors, (286), 141 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:32:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-12-14 13:32:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 13:32:14,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:32:14,256 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2022-12-14 13:32:14,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 13:32:14,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:14,457 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:32:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:32:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -685779309, now seen corresponding path program 35 times [2022-12-14 13:32:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:32:14,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741037589] [2022-12-14 13:32:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:32:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:32:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:32:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 256 proven. 869 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:32:16,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:32:16,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741037589] [2022-12-14 13:32:16,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741037589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:32:16,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449608966] [2022-12-14 13:32:16,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:32:16,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:32:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:32:16,519 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:32:16,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 13:33:44,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 13:33:44,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:33:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 147 conjunts are in the unsatisfiable core [2022-12-14 13:33:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:44,509 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:33:44,509 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 13:33:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 289 proven. 836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:45,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 289 proven. 836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:33:47,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449608966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:47,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160272982] [2022-12-14 13:33:47,879 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:33:47,879 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:47,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:47,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:47,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:47,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:33:47,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:33:47,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:33:47,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:33:47,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:33:48,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:48,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:48,076 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:33:48,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:33:48,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:48,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:48,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:33:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:33:48,181 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:33:48,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:33:48,302 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:33:48,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:33:48,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:33:53,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28639#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:53,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:53,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:33:53,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2022-12-14 13:33:53,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080369864] [2022-12-14 13:33:53,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:53,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-12-14 13:33:53,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:53,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-12-14 13:33:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2180, Invalid=15642, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 13:33:53,389 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 125 states, 124 states have (on average 3.193548387096774) internal successors, (396), 124 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:55,956 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-12-14 13:33:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 13:33:55,956 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 3.193548387096774) internal successors, (396), 124 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-12-14 13:33:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:55,957 INFO L225 Difference]: With dead ends: 140 [2022-12-14 13:33:55,957 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 13:33:55,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 285 SyntacticMatches, 18 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11284 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=5647, Invalid=24803, Unknown=0, NotChecked=0, Total=30450 [2022-12-14 13:33:55,958 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 799 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:55,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 351 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:33:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 13:33:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-12-14 13:33:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-12-14 13:33:55,960 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 132 [2022-12-14 13:33:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:55,960 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-12-14 13:33:55,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 124 states have (on average 3.193548387096774) internal successors, (396), 124 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:33:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-12-14 13:33:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 13:33:55,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:55,961 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2022-12-14 13:33:55,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 13:33:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:56,162 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:33:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -343426417, now seen corresponding path program 36 times [2022-12-14 13:33:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:56,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289423042] [2022-12-14 13:33:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 56 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:01,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:34:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289423042] [2022-12-14 13:34:01,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289423042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:34:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664335354] [2022-12-14 13:34:01,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:34:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:34:01,400 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:34:01,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 13:34:03,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:34:03,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:34:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 310 conjunts are in the unsatisfiable core [2022-12-14 13:34:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:34:03,232 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 10 treesize of output 8 [2022-12-14 13:34:04,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:04,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 13:34:04,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:04,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:04,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:04,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 13:34:05,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 13:34:05,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 13:34:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 56 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:05,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:34:05,945 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3842 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-12-14 13:34:06,567 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3840 (Array Int Int)) (v_ArrVal_3842 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3840) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:34:06,572 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3842 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:34:06,578 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3839 (Array Int Int)) (v_ArrVal_3842 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3839) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:34:06,583 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3842 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-12-14 13:34:08,910 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3842 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:34:10,527 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3842 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:34:10,534 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3842 (Array Int Int)) (v_ArrVal_3836 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3836) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3842) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-12-14 13:34:11,909 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3831 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3831) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0))) is different from false [2022-12-14 13:34:11,996 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3830) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0))) is different from false [2022-12-14 13:34:12,086 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3829 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3829) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0))) is different from false [2022-12-14 13:34:12,748 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3826 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3826) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-12-14 13:34:12,819 WARN L837 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_3825 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3825) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0))) is different from false [2022-12-14 13:34:13,035 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3825 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_3825) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src#1.offset| 18)) 0)) is different from false [2022-12-14 13:34:13,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:13,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 13:34:13,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:34:13,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 13:34:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 56 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 446 not checked. [2022-12-14 13:34:13,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664335354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:34:13,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965444504] [2022-12-14 13:34:13,457 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:34:13,457 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:34:13,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:34:13,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:34:13,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:34:13,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:13,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:34:13,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:13,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:13,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:13,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:13,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:13,669 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:34:13,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:34:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:13,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:13,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:13,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:13,797 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:34:13,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:34:13,866 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:34:13,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:34:13,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:34:21,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29973#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:34:21,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:34:21,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:34:21,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 62, 62] total 148 [2022-12-14 13:34:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439780444] [2022-12-14 13:34:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-12-14 13:34:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:34:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-12-14 13:34:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=19795, Unknown=361, NotChecked=4158, Total=24806 [2022-12-14 13:34:21,584 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:34:31,076 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2022-12-14 13:34:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 13:34:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-12-14 13:34:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:34:31,078 INFO L225 Difference]: With dead ends: 237 [2022-12-14 13:34:31,078 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 13:34:31,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 300 SyntacticMatches, 44 SemanticMatches, 210 ConstructedPredicates, 14 IntricatePredicates, 1 DeprecatedPredicates, 11465 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=1015, Invalid=37680, Unknown=367, NotChecked=5670, Total=44732 [2022-12-14 13:34:31,080 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 327 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 8406 mSolverCounterSat, 63 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 10393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 8406 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 1889 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:34:31,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1460 Invalid, 10393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 8406 Invalid, 35 Unknown, 1889 Unchecked, 3.6s Time] [2022-12-14 13:34:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 13:34:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-12-14 13:34:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-12-14 13:34:31,083 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2022-12-14 13:34:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:34:31,083 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-12-14 13:34:31,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 148 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-12-14 13:34:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 13:34:31,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:34:31,084 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:34:31,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 13:34:31,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-14 13:34:31,285 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:34:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:34:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash 406654907, now seen corresponding path program 37 times [2022-12-14 13:34:31,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:34:31,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561554760] [2022-12-14 13:34:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:34:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:34:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 289 proven. 965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:33,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:34:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561554760] [2022-12-14 13:34:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561554760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:34:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255543100] [2022-12-14 13:34:33,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:34:33,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:34:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:34:33,226 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:34:33,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 13:34:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:34:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 189 conjunts are in the unsatisfiable core [2022-12-14 13:34:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:34:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 324 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:34,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:34:35,249 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 5 treesize of output 3 [2022-12-14 13:34:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 324 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:34:35,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255543100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:34:35,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255976836] [2022-12-14 13:34:35,830 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:34:35,830 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:34:35,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:34:35,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:34:35,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:34:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:35,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 13:34:35,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 13:34:35,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:35,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:35,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 13:34:36,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,038 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-12-14 13:34:36,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 13:34:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:36,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:34:36,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:34:36,165 INFO L321 Elim1Store]: treesize reduction 99, result has 15.4 percent of original size [2022-12-14 13:34:36,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 48 treesize of output 52 [2022-12-14 13:34:36,256 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 13:34:36,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 13:34:36,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:34:38,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31397#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_cstrncpy_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (<= |ULTIMATE.start_cstrncpy_#in~src#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_~d~0#1.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.base|) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrncpy_~d~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.base|) (<= 1 |ULTIMATE.start_cstrncpy_#in~n#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~src#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#t~post3#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_~dst#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc11#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrncpy_#in~dst#1.base|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrncpy_~s~0#1.offset|) (<= |ULTIMATE.start_cstrncpy_~dst#1.offset| 0) (<= |ULTIMATE.start_cstrncpy_#in~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_~s~0#1.base|) (<= |ULTIMATE.start_cstrncpy_~src#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 13:34:38,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:34:38,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:34:38,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 89 [2022-12-14 13:34:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726270797] [2022-12-14 13:34:38,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:34:38,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 13:34:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:34:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 13:34:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=8922, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:34:38,653 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 91 states, 90 states have (on average 3.1333333333333333) internal successors, (282), 90 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:34:41,951 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2022-12-14 13:34:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 13:34:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 3.1333333333333333) internal successors, (282), 90 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2022-12-14 13:34:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:34:41,952 INFO L225 Difference]: With dead ends: 147 [2022-12-14 13:34:41,952 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 13:34:41,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 340 SyntacticMatches, 20 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6163 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3456, Invalid=16850, Unknown=0, NotChecked=0, Total=20306 [2022-12-14 13:34:41,953 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1122 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 3646 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 3647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:34:41,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 529 Invalid, 3647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3646 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:34:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 13:34:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2022-12-14 13:34:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-12-14 13:34:41,955 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 139 [2022-12-14 13:34:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:34:41,955 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-12-14 13:34:41,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 3.1333333333333333) internal successors, (282), 90 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:34:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-12-14 13:34:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:34:41,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:34:41,956 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2022-12-14 13:34:41,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 13:34:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeea7c27-227d-4ccb-98c7-c5dd54d90b69/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-14 13:34:42,157 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 13:34:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:34:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1560803943, now seen corresponding path program 38 times [2022-12-14 13:34:42,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:34:42,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419292696] [2022-12-14 13:34:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:34:42,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:34:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat