./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/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_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7 --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 --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:49:04,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:49:04,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:49:04,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:49:04,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:49:04,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:49:04,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:49:04,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:49:04,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:49:04,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:49:04,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:49:04,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:49:04,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:49:04,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:49:04,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:49:04,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:49:04,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:49:04,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:49:04,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:49:04,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:49:04,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:49:04,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:49:04,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:49:04,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:49:04,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:49:04,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:49:04,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:49:04,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:49:04,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:49:04,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:49:04,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:49:04,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:49:04,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:49:04,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:49:04,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:49:04,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:49:04,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:49:04,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:49:04,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:49:04,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:49:04,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:49:04,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 17:49:04,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:49:04,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:49:04,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:49:04,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:49:04,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:49:04,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:49:04,810 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:49:04,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:49:04,810 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:49:04,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:49:04,810 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:49:04,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:49:04,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:49:04,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:49:04,811 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:49:04,811 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:49:04,811 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:49:04,812 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:49:04,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 17:49:04,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 17:49:04,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:49:04,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:49:04,813 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 17:49:04,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:49:04,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:49:04,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:49:04,814 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 17:49:04,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 17:49:04,814 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 17:49:04,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:49:04,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 17:49:04,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:49:04,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:49:04,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:49:04,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:49:04,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:04,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:49:04,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:49:04,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:49:04,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:49:04,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:49:04,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:49:04,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 [2021-11-25 17:49:05,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:49:05,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:49:05,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:49:05,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:49:05,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:49:05,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2021-11-25 17:49:05,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/data/59ca11909/98248e81a35140c68cc9e0ea2387ce5d/FLAG66353c39f [2021-11-25 17:49:05,709 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:49:05,709 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2021-11-25 17:49:05,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/data/59ca11909/98248e81a35140c68cc9e0ea2387ce5d/FLAG66353c39f [2021-11-25 17:49:06,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/data/59ca11909/98248e81a35140c68cc9e0ea2387ce5d [2021-11-25 17:49:06,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:49:06,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:49:06,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:06,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:49:06,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:49:06,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be7006c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06, skipping insertion in model container [2021-11-25 17:49:06,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:49:06,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:49:06,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:06,461 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:49:06,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:49:06,549 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:49:06,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06 WrapperNode [2021-11-25 17:49:06,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:06,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:49:06,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:49:06,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:49:06,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,593 INFO L137 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-25 17:49:06,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:49:06,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:49:06,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:49:06,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:49:06,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:49:06,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:49:06,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:49:06,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:49:06,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (1/1) ... [2021-11-25 17:49:06,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:06,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:49:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:49:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:49:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:49:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:49:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:49:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:49:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:49:06,786 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:49:06,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:49:06,985 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:49:07,081 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:49:07,081 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 17:49:07,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:07 BoogieIcfgContainer [2021-11-25 17:49:07,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:49:07,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:49:07,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:49:07,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:49:07,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:49:06" (1/3) ... [2021-11-25 17:49:07,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b26b00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:07, skipping insertion in model container [2021-11-25 17:49:07,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:06" (2/3) ... [2021-11-25 17:49:07,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b26b00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:49:07, skipping insertion in model container [2021-11-25 17:49:07,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:49:07" (3/3) ... [2021-11-25 17:49:07,098 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-2.i [2021-11-25 17:49:07,103 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:49:07,104 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-25 17:49:07,142 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:49:07,149 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:49:07,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-25 17:49:07,163 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) [2021-11-25 17:49:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 17:49:07,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:07,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 17:49:07,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 133892, now seen corresponding path program 1 times [2021-11-25 17:49:07,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244052690] [2021-11-25 17:49:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:07,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:07,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244052690] [2021-11-25 17:49:07,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244052690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:07,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:07,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 17:49:07,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36803671] [2021-11-25 17:49:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:49:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:49:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:07,413 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 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2021-11-25 17:49:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:07,486 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-25 17:49:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:49:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2021-11-25 17:49:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:07,498 INFO L225 Difference]: With dead ends: 25 [2021-11-25 17:49:07,498 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 17:49:07,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:07,504 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:07,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 14 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 17:49:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 17:49:07,535 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) [2021-11-25 17:49:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 17:49:07,537 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 3 [2021-11-25 17:49:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:07,538 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 17:49:07,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2021-11-25 17:49:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 17:49:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 17:49:07,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:07,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 17:49:07,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:49:07,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 133893, now seen corresponding path program 1 times [2021-11-25 17:49:07,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:07,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913821018] [2021-11-25 17:49:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:07,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:07,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:07,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913821018] [2021-11-25 17:49:07,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913821018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:07,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:07,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 17:49:07,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717036742] [2021-11-25 17:49:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:07,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:49:07,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:07,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:49:07,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:07,672 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2021-11-25 17:49:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:07,710 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-11-25 17:49:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:49:07,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2021-11-25 17:49:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:07,712 INFO L225 Difference]: With dead ends: 23 [2021-11-25 17:49:07,712 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 17:49:07,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:07,714 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:07,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 17:49:07,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 17:49:07,718 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) [2021-11-25 17:49:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 17:49:07,719 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 3 [2021-11-25 17:49:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:07,719 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 17:49:07,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2021-11-25 17:49:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 17:49:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 17:49:07,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:07,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 17:49:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:49:07,721 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash 131435, now seen corresponding path program 1 times [2021-11-25 17:49:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126870475] [2021-11-25 17:49:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:07,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:07,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:07,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126870475] [2021-11-25 17:49:07,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126870475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:07,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:07,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:49:07,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182197760] [2021-11-25 17:49:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:07,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:07,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:07,860 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) [2021-11-25 17:49:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:07,949 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-11-25 17:49:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:07,950 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 [2021-11-25 17:49:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:07,952 INFO L225 Difference]: With dead ends: 44 [2021-11-25 17:49:07,953 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 17:49:07,954 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:07,961 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 30 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 [2021-11-25 17:49:07,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 17:49:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-11-25 17:49:07,971 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) [2021-11-25 17:49:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-25 17:49:07,972 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 3 [2021-11-25 17:49:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:07,972 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-25 17:49:07,972 INFO L471 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) [2021-11-25 17:49:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-25 17:49:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 17:49:07,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:07,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-25 17:49:07,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:49:07,975 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:07,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash 126379927, now seen corresponding path program 1 times [2021-11-25 17:49:07,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:07,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931202127] [2021-11-25 17:49:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:07,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:08,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931202127] [2021-11-25 17:49:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931202127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341302481] [2021-11-25 17:49:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:08,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:08,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:08,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:08,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:49:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:49:08,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:08,321 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:49:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:08,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:08,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341302481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1302246091] [2021-11-25 17:49:08,625 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-25 17:49:08,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:08,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:08,635 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:08,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:08,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:08,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:09,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:09,072 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:09,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '240#(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) (< (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1)) (<= 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) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~malloc10#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 17:49:09,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:09,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:09,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2021-11-25 17:49:09,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853117929] [2021-11-25 17:49:09,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:09,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:49:09,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:49:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 17:49:09,363 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:09,565 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-11-25 17:49:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2021-11-25 17:49:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:09,568 INFO L225 Difference]: With dead ends: 63 [2021-11-25 17:49:09,568 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 17:49:09,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-25 17:49:09,571 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:09,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 130 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 17:49:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 22. [2021-11-25 17:49:09,575 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) [2021-11-25 17:49:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-25 17:49:09,576 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2021-11-25 17:49:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:09,578 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-25 17:49:09,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-25 17:49:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 17:49:09,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:09,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 17:49:09,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:49:09,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:09,805 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash -304350351, now seen corresponding path program 1 times [2021-11-25 17:49:09,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:09,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600090412] [2021-11-25 17:49:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:09,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:09,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:09,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600090412] [2021-11-25 17:49:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600090412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:09,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:09,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:49:09,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783490118] [2021-11-25 17:49:09,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:09,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:09,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:09,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:09,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:09,913 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) [2021-11-25 17:49:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:09,947 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-11-25 17:49:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:09,948 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 [2021-11-25 17:49:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:09,949 INFO L225 Difference]: With dead ends: 31 [2021-11-25 17:49:09,949 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 17:49:09,949 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:09,950 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:09,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 17:49:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-11-25 17:49:09,955 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) [2021-11-25 17:49:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-25 17:49:09,957 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2021-11-25 17:49:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:09,958 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-25 17:49:09,958 INFO L471 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) [2021-11-25 17:49:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-25 17:49:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 17:49:09,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:09,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 17:49:09,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:49:09,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -304394198, now seen corresponding path program 1 times [2021-11-25 17:49:09,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:09,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623423493] [2021-11-25 17:49:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:09,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:10,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:10,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623423493] [2021-11-25 17:49:10,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623423493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:10,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:10,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:10,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967043216] [2021-11-25 17:49:10,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:10,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:10,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:10,030 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) [2021-11-25 17:49:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:10,072 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-25 17:49:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:10,072 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 [2021-11-25 17:49:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:10,074 INFO L225 Difference]: With dead ends: 21 [2021-11-25 17:49:10,074 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 17:49:10,074 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:10,076 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:10,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 17:49:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 17:49:10,084 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) [2021-11-25 17:49:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-25 17:49:10,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2021-11-25 17:49:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:10,086 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-25 17:49:10,086 INFO L471 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) [2021-11-25 17:49:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-25 17:49:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 17:49:10,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:10,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 17:49:10,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:49:10,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -304394197, now seen corresponding path program 1 times [2021-11-25 17:49:10,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:10,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061111700] [2021-11-25 17:49:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:10,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:10,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:10,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061111700] [2021-11-25 17:49:10,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061111700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:10,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:10,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:10,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957545827] [2021-11-25 17:49:10,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:10,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:10,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:10,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:10,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:10,177 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) [2021-11-25 17:49:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:10,265 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-25 17:49:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:10,266 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 [2021-11-25 17:49:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:10,268 INFO L225 Difference]: With dead ends: 27 [2021-11-25 17:49:10,269 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 17:49:10,269 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:10,270 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 17:49:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-11-25 17:49:10,277 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) [2021-11-25 17:49:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-25 17:49:10,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-11-25 17:49:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:10,278 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-25 17:49:10,278 INFO L471 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) [2021-11-25 17:49:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-25 17:49:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 17:49:10,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:10,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:10,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:49:10,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash -846285529, now seen corresponding path program 1 times [2021-11-25 17:49:10,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:10,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979853673] [2021-11-25 17:49:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:10,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:10,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:10,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979853673] [2021-11-25 17:49:10,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979853673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:10,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:10,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:10,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462928254] [2021-11-25 17:49:10,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:10,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:10,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:10,367 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) [2021-11-25 17:49:10,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:10,430 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-25 17:49:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:10,431 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 [2021-11-25 17:49:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:10,432 INFO L225 Difference]: With dead ends: 22 [2021-11-25 17:49:10,432 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 17:49:10,432 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:10,433 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:10,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 17:49:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 17:49:10,435 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) [2021-11-25 17:49:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-25 17:49:10,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2021-11-25 17:49:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:10,436 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-25 17:49:10,436 INFO L471 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) [2021-11-25 17:49:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-25 17:49:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 17:49:10,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:10,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:10,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:49:10,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -846285528, now seen corresponding path program 1 times [2021-11-25 17:49:10,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64748738] [2021-11-25 17:49:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:10,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:10,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:10,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64748738] [2021-11-25 17:49:10,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64748738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:10,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:10,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:10,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283835152] [2021-11-25 17:49:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:10,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:10,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:10,507 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) [2021-11-25 17:49:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:10,588 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-11-25 17:49:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:10,589 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 [2021-11-25 17:49:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:10,589 INFO L225 Difference]: With dead ends: 24 [2021-11-25 17:49:10,589 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 17:49:10,590 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:10,591 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:10,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 17:49:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-25 17:49:10,593 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) [2021-11-25 17:49:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-25 17:49:10,594 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2021-11-25 17:49:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:10,594 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-25 17:49:10,594 INFO L471 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) [2021-11-25 17:49:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-25 17:49:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 17:49:10,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:10,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:10,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:49:10,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1332772495, now seen corresponding path program 1 times [2021-11-25 17:49:10,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882263519] [2021-11-25 17:49:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:10,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:10,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882263519] [2021-11-25 17:49:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882263519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:10,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:10,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 17:49:10,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287160212] [2021-11-25 17:49:10,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:10,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:49:10,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:49:10,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:49:10,690 INFO L87 Difference]: Start difference. First operand 23 states and 26 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) [2021-11-25 17:49:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:10,806 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-25 17:49:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:49:10,807 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 [2021-11-25 17:49:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:10,807 INFO L225 Difference]: With dead ends: 39 [2021-11-25 17:49:10,807 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 17:49:10,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-25 17:49:10,808 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:10,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 17:49:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-11-25 17:49:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) 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) [2021-11-25 17:49:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-25 17:49:10,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2021-11-25 17:49:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:10,812 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-25 17:49:10,813 INFO L471 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) [2021-11-25 17:49:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-25 17:49:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 17:49:10,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:10,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:10,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:49:10,814 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1331442477, now seen corresponding path program 1 times [2021-11-25 17:49:10,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:10,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526291523] [2021-11-25 17:49:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:10,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:10,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:10,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526291523] [2021-11-25 17:49:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526291523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:10,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:10,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:49:10,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182596922] [2021-11-25 17:49:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:10,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:10,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:10,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:10,849 INFO L87 Difference]: Start difference. First operand 30 states and 34 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) [2021-11-25 17:49:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:10,894 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-25 17:49:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:10,895 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 [2021-11-25 17:49:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:10,895 INFO L225 Difference]: With dead ends: 29 [2021-11-25 17:49:10,896 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 17:49:10,896 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:10,897 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:10,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 17:49:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 17:49:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 28 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) [2021-11-25 17:49:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-25 17:49:10,900 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-11-25 17:49:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-25 17:49:10,900 INFO L471 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) [2021-11-25 17:49:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-25 17:49:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 17:49:10,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:10,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:10,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:49:10,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1331442478, now seen corresponding path program 1 times [2021-11-25 17:49:10,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:10,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003833002] [2021-11-25 17:49:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:10,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:11,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:11,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003833002] [2021-11-25 17:49:11,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003833002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:11,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:11,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 17:49:11,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371035991] [2021-11-25 17:49:11,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:11,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:49:11,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:49:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:49:11,118 INFO L87 Difference]: Start difference. First operand 29 states and 33 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) [2021-11-25 17:49:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:11,356 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-25 17:49:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:49:11,357 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 [2021-11-25 17:49:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:11,358 INFO L225 Difference]: With dead ends: 33 [2021-11-25 17:49:11,358 INFO L226 Difference]: Without dead ends: 33 [2021-11-25 17:49:11,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:49:11,359 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:11,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-25 17:49:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-25 17:49:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-25 17:49:11,362 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 11 [2021-11-25 17:49:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:11,362 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-25 17:49:11,362 INFO L471 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) [2021-11-25 17:49:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-25 17:49:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 17:49:11,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:11,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:11,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:49:11,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1674957138, now seen corresponding path program 1 times [2021-11-25 17:49:11,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:11,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660298740] [2021-11-25 17:49:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:11,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:11,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660298740] [2021-11-25 17:49:11,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660298740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:11,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:11,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:49:11,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705437157] [2021-11-25 17:49:11,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:11,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:49:11,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:49:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:49:11,414 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:11,435 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-25 17:49:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:49:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-25 17:49:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:11,436 INFO L225 Difference]: With dead ends: 32 [2021-11-25 17:49:11,436 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 17:49:11,436 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:49:11,437 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:11,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:49:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 17:49:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-25 17:49:11,439 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) [2021-11-25 17:49:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-25 17:49:11,440 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 12 [2021-11-25 17:49:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:11,440 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-25 17:49:11,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-25 17:49:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:49:11,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:11,441 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:11,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:49:11,441 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 821295651, now seen corresponding path program 1 times [2021-11-25 17:49:11,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:11,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129366505] [2021-11-25 17:49:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:11,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:11,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:11,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129366505] [2021-11-25 17:49:11,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129366505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:11,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574698163] [2021-11-25 17:49:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:11,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:11,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:11,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:49:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 17:49:11,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:11,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:11,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574698163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:11,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057592855] [2021-11-25 17:49:11,955 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:11,955 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:11,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:11,956 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:11,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:12,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:12,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:12,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:12,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:12,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:12,438 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:12,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:12,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:12,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:12,755 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:49:12,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:12,915 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:12,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:13,076 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:14,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1020#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:49:14,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:14,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:14,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2021-11-25 17:49:14,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720431180] [2021-11-25 17:49:14,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:14,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 17:49:14,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 17:49:14,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-11-25 17:49:14,386 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) [2021-11-25 17:49:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:14,747 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-11-25 17:49:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 17:49:14,748 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 [2021-11-25 17:49:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:14,748 INFO L225 Difference]: With dead ends: 48 [2021-11-25 17:49:14,749 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 17:49:14,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 17:49:14,750 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 161 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:14,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 78 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:49:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 17:49:14,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-11-25 17:49:14,753 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) [2021-11-25 17:49:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-25 17:49:14,753 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2021-11-25 17:49:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:14,753 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-25 17:49:14,754 INFO L471 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) [2021-11-25 17:49:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-25 17:49:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 17:49:14,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:14,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:14,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:14,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 17:49:14,961 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash 980834032, now seen corresponding path program 1 times [2021-11-25 17:49:14,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952388171] [2021-11-25 17:49:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:14,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:15,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952388171] [2021-11-25 17:49:15,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952388171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008358598] [2021-11-25 17:49:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:15,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:15,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:15,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:49:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 17:49:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:15,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:15,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:15,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:16,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008358598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33703361] [2021-11-25 17:49:16,396 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 17:49:16,396 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:16,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:16,396 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:16,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:16,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:16,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:16,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:16,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:16,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:16,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 33 [2021-11-25 17:49:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:17,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:17,234 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:19,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1236#(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 [2021-11-25 17:49:19,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:19,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:19,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2021-11-25 17:49:19,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807848430] [2021-11-25 17:49:19,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:19,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 17:49:19,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:19,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 17:49:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 17:49:19,638 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) [2021-11-25 17:49:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:20,658 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-25 17:49:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 17:49:20,659 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 [2021-11-25 17:49:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:20,659 INFO L225 Difference]: With dead ends: 49 [2021-11-25 17:49:20,659 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 17:49:20,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=520, Invalid=3262, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 17:49:20,662 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:20,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:49:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 17:49:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-25 17:49:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 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) [2021-11-25 17:49:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-25 17:49:20,666 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 14 [2021-11-25 17:49:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:20,666 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-25 17:49:20,666 INFO L471 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) [2021-11-25 17:49:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-25 17:49:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 17:49:20,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:20,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:20,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 17:49:20,873 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -309638608, now seen corresponding path program 1 times [2021-11-25 17:49:20,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:20,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934969047] [2021-11-25 17:49:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:20,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:21,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934969047] [2021-11-25 17:49:21,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934969047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035817119] [2021-11-25 17:49:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:21,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:21,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:21,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:21,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:49:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 17:49:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:21,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:21,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:21,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035817119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:21,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722855448] [2021-11-25 17:49:21,818 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:21,818 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:21,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:21,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:21,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:21,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:21,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:22,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:22,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:22,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:22,214 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:22,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:22,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:22,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:22,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:22,414 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:49:22,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:22,552 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:22,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:22,689 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:23,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1485#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |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 [2021-11-25 17:49:23,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:23,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:23,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2021-11-25 17:49:23,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846234519] [2021-11-25 17:49:23,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:23,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 17:49:23,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:23,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 17:49:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 17:49:23,969 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2021-11-25 17:49:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:24,569 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-25 17:49:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:49:24,569 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 [2021-11-25 17:49:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:24,569 INFO L225 Difference]: With dead ends: 47 [2021-11-25 17:49:24,569 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 17:49:24,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 17:49:24,571 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 79 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:24,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 40 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:49:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 17:49:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-25 17:49:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-25 17:49:24,574 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 14 [2021-11-25 17:49:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:24,574 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-25 17:49:24,574 INFO L471 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) [2021-11-25 17:49:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-25 17:49:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:49:24,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:24,575 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:24,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:24,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:24,784 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1166758143, now seen corresponding path program 2 times [2021-11-25 17:49:24,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:24,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626889683] [2021-11-25 17:49:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:24,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:25,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:25,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626889683] [2021-11-25 17:49:25,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626889683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:25,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466594824] [2021-11-25 17:49:25,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:49:25,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:25,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:25,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:49:25,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 17:49:25,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:49:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 17:49:25,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,526 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-25 17:49:25,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:25,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:25,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_211 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_211) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:49:25,607 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_211 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_211) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:49:25,613 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_211 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_211) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~src#1.offset| 1)) 0)) is different from false [2021-11-25 17:49:25,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:49:25,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:49:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:49:25,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:49:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 17:49:25,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466594824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:25,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189840884] [2021-11-25 17:49:25,789 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:25,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:25,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:25,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:25,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:25,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:25,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:26,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:26,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:26,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:26,173 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:26,375 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:49:26,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:26,541 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:26,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:26,711 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:28,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1737#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:49:28,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:28,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:28,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2021-11-25 17:49:28,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450912740] [2021-11-25 17:49:28,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:28,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 17:49:28,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 17:49:28,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1073, Unknown=3, NotChecked=204, Total=1406 [2021-11-25 17:49:28,479 INFO L87 Difference]: Start difference. First operand 47 states and 53 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) [2021-11-25 17:49:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:28,791 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-25 17:49:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 17:49:28,791 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 [2021-11-25 17:49:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:28,792 INFO L225 Difference]: With dead ends: 80 [2021-11-25 17:49:28,792 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 17:49:28,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=174, Invalid=1475, Unknown=3, NotChecked=240, Total=1892 [2021-11-25 17:49:28,794 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:28,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 211 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 199 Invalid, 0 Unknown, 222 Unchecked, 0.1s Time] [2021-11-25 17:49:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 17:49:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-11-25 17:49:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 59 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) [2021-11-25 17:49:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-25 17:49:28,799 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 18 [2021-11-25 17:49:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:28,799 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-25 17:49:28,799 INFO L471 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) [2021-11-25 17:49:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-25 17:49:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:49:28,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:28,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:28,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:29,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 17:49:29,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1165427766, now seen corresponding path program 1 times [2021-11-25 17:49:29,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:29,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549879716] [2021-11-25 17:49:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:29,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:29,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549879716] [2021-11-25 17:49:29,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549879716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103097471] [2021-11-25 17:49:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:29,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:29,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:29,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:29,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:49:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 17:49:29,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:29,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:29,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:29,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:49:30,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103097471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:30,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932102559] [2021-11-25 17:49:30,141 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 17:49:30,141 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:30,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:30,142 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:30,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:30,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:30,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:30,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:30,507 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:30,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,658 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:30,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,781 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:30,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:30,901 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:34,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2033#(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|) (= (select (select |#memory_int| |ULTIMATE.start_cstrncpy_#t~post7#1.base|) (+ (- 1) |ULTIMATE.start_cstrncpy_#t~post7#1.offset|)) 0) (<= 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|) (<= 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 [2021-11-25 17:49:34,009 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:34,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:34,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2021-11-25 17:49:34,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399477525] [2021-11-25 17:49:34,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:34,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 17:49:34,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 17:49:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 17:49:34,012 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2021-11-25 17:49:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:35,116 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2021-11-25 17:49:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 17:49:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 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 [2021-11-25 17:49:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:35,118 INFO L225 Difference]: With dead ends: 83 [2021-11-25 17:49:35,118 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 17:49:35,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=446, Invalid=4110, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 17:49:35,120 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 95 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:35,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:49:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 17:49:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-11-25 17:49:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.25) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-11-25 17:49:35,125 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 18 [2021-11-25 17:49:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:35,125 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-11-25 17:49:35,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 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) [2021-11-25 17:49:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-11-25 17:49:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 17:49:35,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:35,127 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 17:49:35,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:35,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 17:49:35,333 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1690193235, now seen corresponding path program 3 times [2021-11-25 17:49:35,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164357890] [2021-11-25 17:49:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:35,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:35,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:35,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164357890] [2021-11-25 17:49:35,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164357890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:35,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927811196] [2021-11-25 17:49:35,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:49:35,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:35,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:49:35,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:49:35,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:49:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-25 17:49:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:35,603 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:49:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:35,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:36,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927811196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:36,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096689371] [2021-11-25 17:49:36,036 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:36,036 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:36,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:36,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:36,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:36,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:36,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:36,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:36,378 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:36,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:36,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:36,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:36,551 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:49:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,701 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:36,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:36,826 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:37,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2384#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:49:37,981 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:37,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:37,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-11-25 17:49:37,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191617711] [2021-11-25 17:49:37,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:37,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 17:49:37,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 17:49:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 17:49:37,987 INFO L87 Difference]: Start difference. First operand 67 states and 80 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) [2021-11-25 17:49:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:38,500 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-11-25 17:49:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 17:49:38,501 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 [2021-11-25 17:49:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:38,502 INFO L225 Difference]: With dead ends: 123 [2021-11-25 17:49:38,502 INFO L226 Difference]: Without dead ends: 123 [2021-11-25 17:49:38,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=320, Invalid=1842, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 17:49:38,503 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:38,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 163 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:49:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-25 17:49:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 67. [2021-11-25 17:49:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-11-25 17:49:38,508 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 20 [2021-11-25 17:49:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:38,508 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-11-25 17:49:38,509 INFO L471 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) [2021-11-25 17:49:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-11-25 17:49:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 17:49:38,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:38,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 17:49:38,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:38,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:38,721 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash 856382720, now seen corresponding path program 2 times [2021-11-25 17:49:38,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:38,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839558198] [2021-11-25 17:49:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:38,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:49:39,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839558198] [2021-11-25 17:49:39,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839558198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084998447] [2021-11-25 17:49:39,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:49:39,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:39,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:39,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 17:49:39,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 17:49:39,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:49:39,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 17:49:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:39,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:39,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:49:39,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:49:40,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084998447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230779226] [2021-11-25 17:49:40,107 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:40,107 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:40,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:40,108 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:40,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:40,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:40,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:40,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:40,419 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:40,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:40,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:40,571 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:49:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,672 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:40,764 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:42,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2763#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |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 [2021-11-25 17:49:42,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:42,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:42,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2021-11-25 17:49:42,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121337142] [2021-11-25 17:49:42,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:42,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 17:49:42,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 17:49:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 17:49:42,095 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 36 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) [2021-11-25 17:49:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:43,841 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-11-25 17:49:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 17:49:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) Word has length 21 [2021-11-25 17:49:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:43,842 INFO L225 Difference]: With dead ends: 70 [2021-11-25 17:49:43,842 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 17:49:43,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=425, Invalid=3865, Unknown=0, NotChecked=0, Total=4290 [2021-11-25 17:49:43,844 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 127 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:43,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 59 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:49:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 17:49:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-11-25 17:49:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-25 17:49:43,848 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 21 [2021-11-25 17:49:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:43,848 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-25 17:49:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 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) [2021-11-25 17:49:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-25 17:49:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 17:49:43,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:43,850 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:43,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:44,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:44,056 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1378925394, now seen corresponding path program 2 times [2021-11-25 17:49:44,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:44,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138683180] [2021-11-25 17:49:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:44,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:44,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138683180] [2021-11-25 17:49:44,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138683180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393565042] [2021-11-25 17:49:44,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:49:44,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:44,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:44,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:44,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 17:49:44,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 17:49:44,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:49:44,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-25 17:49:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:44,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:44,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:44,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:45,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:45,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393565042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704735886] [2021-11-25 17:49:45,926 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 17:49:45,926 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:45,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:45,926 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:45,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:45,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:45,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:46,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:46,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:46,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:46,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:46,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 33 [2021-11-25 17:49:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:46,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:46,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:48,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3129#(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 [2021-11-25 17:49:48,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:48,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:48,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2021-11-25 17:49:48,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074180202] [2021-11-25 17:49:48,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:48,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 17:49:48,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 17:49:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 17:49:48,906 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 46 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:50,937 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-11-25 17:49:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-25 17:49:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 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 23 [2021-11-25 17:49:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:50,938 INFO L225 Difference]: With dead ends: 85 [2021-11-25 17:49:50,938 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 17:49:50,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=912, Invalid=7460, Unknown=0, NotChecked=0, Total=8372 [2021-11-25 17:49:50,941 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:50,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 175 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:49:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 17:49:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-25 17:49:50,943 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) [2021-11-25 17:49:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-25 17:49:50,943 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 23 [2021-11-25 17:49:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:50,944 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-25 17:49:50,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-25 17:49:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 17:49:50,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:50,945 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 17:49:50,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:51,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 17:49:51,152 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:51,153 INFO L85 PathProgramCache]: Analyzing trace with hash -735740977, now seen corresponding path program 4 times [2021-11-25 17:49:51,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:51,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367974235] [2021-11-25 17:49:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:51,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:51,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367974235] [2021-11-25 17:49:51,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367974235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76389144] [2021-11-25 17:49:51,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:49:51,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:51,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:51,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 17:49:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-25 17:49:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:51,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:51,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:51,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:51,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:52,016 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_384) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:49:52,024 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:49:52,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_383 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_383) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:49:52,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:49:52,051 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_384) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)))) is different from false [2021-11-25 17:49:52,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:49:52,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:49:52,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:49:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:49:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-25 17:49:52,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76389144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:52,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576516705] [2021-11-25 17:49:52,219 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:52,220 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:52,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:52,220 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:52,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:52,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:52,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:52,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:52,544 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:52,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:52,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:52,730 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:49:52,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,852 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:52,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:52,953 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:54,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3511#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:49:54,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:54,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:54,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2021-11-25 17:49:54,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035945729] [2021-11-25 17:49:54,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:54,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 17:49:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 17:49:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1290, Unknown=5, NotChecked=380, Total=1806 [2021-11-25 17:49:54,075 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2021-11-25 17:49:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:54,444 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-25 17:49:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 17:49:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) Word has length 25 [2021-11-25 17:49:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:54,445 INFO L225 Difference]: With dead ends: 57 [2021-11-25 17:49:54,445 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 17:49:54,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=178, Invalid=1729, Unknown=5, NotChecked=440, Total=2352 [2021-11-25 17:49:54,447 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:54,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 165 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 207 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2021-11-25 17:49:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 17:49:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-25 17:49:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) 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) [2021-11-25 17:49:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-25 17:49:54,449 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2021-11-25 17:49:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:54,449 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-25 17:49:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 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) [2021-11-25 17:49:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-25 17:49:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 17:49:54,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:54,451 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 17:49:54,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:54,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:54,664 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1455536379, now seen corresponding path program 5 times [2021-11-25 17:49:54,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:54,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964223515] [2021-11-25 17:49:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:54,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:54,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964223515] [2021-11-25 17:49:54,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964223515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292075502] [2021-11-25 17:49:54,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:49:54,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:54,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:54,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 17:49:55,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 17:49:55,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:49:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 17:49:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:55,252 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:49:55,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:49:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:55,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292075502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:49:55,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088071158] [2021-11-25 17:49:55,958 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:49:55,958 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:49:55,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:49:55,958 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:49:55,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:49:55,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:49:56,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:56,254 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:49:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:56,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:49:56,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:49:56,461 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:49:56,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,571 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:49:56,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:56,683 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:49:57,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3824#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:49:57,829 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:49:57,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:49:57,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2021-11-25 17:49:57,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141994951] [2021-11-25 17:49:57,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:49:57,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 17:49:57,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 17:49:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 17:49:57,831 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:58,303 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-25 17:49:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 17:49:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2021-11-25 17:49:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:58,304 INFO L225 Difference]: With dead ends: 40 [2021-11-25 17:49:58,304 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 17:49:58,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 17:49:58,306 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 172 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:58,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 41 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:49:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 17:49:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 17:49:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 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) [2021-11-25 17:49:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-25 17:49:58,308 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2021-11-25 17:49:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:58,309 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-25 17:49:58,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:49:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-25 17:49:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 17:49:58,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:58,310 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 17:49:58,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 17:49:58,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:58,524 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:49:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1631263015, now seen corresponding path program 6 times [2021-11-25 17:49:58,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:58,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098187082] [2021-11-25 17:49:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:58,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:49:58,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:58,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098187082] [2021-11-25 17:49:58,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098187082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:58,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971653853] [2021-11-25 17:49:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:49:58,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:58,965 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:58,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 17:49:59,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:49:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:49:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 17:49:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:59,135 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:49:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:59,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:49:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:00,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-11-25 17:50:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:00,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:06,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:06,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 22 [2021-11-25 17:50:06,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:06,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2021-11-25 17:50:06,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-25 17:50:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 29 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:07,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971653853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122995461] [2021-11-25 17:50:07,169 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:07,169 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:07,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:07,170 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:07,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:07,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:07,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:07,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:07,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:07,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:07,440 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:07,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:07,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:07,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:07,583 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:50:07,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 54 [2021-11-25 17:50:07,696 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:07,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:07,780 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:09,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4172#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:09,253 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:09,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:09,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 50 [2021-11-25 17:50:09,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751277245] [2021-11-25 17:50:09,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:09,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 17:50:09,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 17:50:09,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3263, Unknown=47, NotChecked=0, Total=3540 [2021-11-25 17:50:09,255 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 50 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:10,283 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-25 17:50:10,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 17:50:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 50 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2021-11-25 17:50:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:10,284 INFO L225 Difference]: With dead ends: 64 [2021-11-25 17:50:10,284 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 17:50:10,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=495, Invalid=5778, Unknown=47, NotChecked=0, Total=6320 [2021-11-25 17:50:10,287 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:10,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 211 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-25 17:50:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 17:50:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-25 17:50:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1025641025641026) 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) [2021-11-25 17:50:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-25 17:50:10,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2021-11-25 17:50:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:10,290 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-25 17:50:10,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 50 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-25 17:50:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 17:50:10,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:10,293 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 17:50:10,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 17:50:10,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 17:50:10,496 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2038690427, now seen corresponding path program 7 times [2021-11-25 17:50:10,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:10,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827439989] [2021-11-25 17:50:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:10,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:10,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827439989] [2021-11-25 17:50:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827439989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589447836] [2021-11-25 17:50:10,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:50:10,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:10,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:10,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 17:50:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:10,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 17:50:10,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:11,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:11,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589447836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794209850] [2021-11-25 17:50:11,448 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:11,448 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:11,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:11,449 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:11,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:11,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:11,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:11,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:11,729 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:11,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:11,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:11,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:11,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:11,888 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:11,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:11,996 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:11,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:12,115 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:13,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4559#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:13,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:13,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:13,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-11-25 17:50:13,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280495114] [2021-11-25 17:50:13,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:13,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 17:50:13,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 17:50:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 17:50:13,770 INFO L87 Difference]: Start difference. First operand 42 states and 43 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) [2021-11-25 17:50:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:14,336 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-11-25 17:50:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 17:50:14,337 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 [2021-11-25 17:50:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:14,337 INFO L225 Difference]: With dead ends: 48 [2021-11-25 17:50:14,337 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 17:50:14,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=411, Invalid=2345, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 17:50:14,338 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 224 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:14,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 85 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:50:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 17:50:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-25 17:50:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-25 17:50:14,341 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2021-11-25 17:50:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:14,341 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-25 17:50:14,342 INFO L471 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) [2021-11-25 17:50:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-25 17:50:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 17:50:14,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:14,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 17:50:14,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 17:50:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 17:50:14,553 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1225106216, now seen corresponding path program 3 times [2021-11-25 17:50:14,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343887851] [2021-11-25 17:50:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:14,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:14,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343887851] [2021-11-25 17:50:14,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343887851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348712094] [2021-11-25 17:50:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:50:14,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:14,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:14,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 17:50:15,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:50:15,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-25 17:50:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:15,129 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:50:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:15,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:15,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348712094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214512620] [2021-11-25 17:50:16,671 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:16,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:16,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:16,671 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:16,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:16,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:16,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:16,948 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:17,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:17,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:17,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:17,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:17,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:17,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:17,128 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:17,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:17,225 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:17,300 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:18,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4939#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrncpy_#t~post4#1.base|) 1) (<= |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 [2021-11-25 17:50:18,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:18,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:18,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 46 [2021-11-25 17:50:18,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606815269] [2021-11-25 17:50:18,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:18,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 17:50:18,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 17:50:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2923, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 17:50:18,724 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:20,009 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-11-25 17:50:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 17:50:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 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 35 [2021-11-25 17:50:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:20,010 INFO L225 Difference]: With dead ends: 46 [2021-11-25 17:50:20,010 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 17:50:20,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=635, Invalid=5527, Unknown=0, NotChecked=0, Total=6162 [2021-11-25 17:50:20,011 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 98 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:20,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 31 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 17:50:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-11-25 17:50:20,013 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) [2021-11-25 17:50:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-25 17:50:20,013 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2021-11-25 17:50:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:20,013 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-25 17:50:20,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-25 17:50:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 17:50:20,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:20,015 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 17:50:20,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:20,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:20,220 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash -966733913, now seen corresponding path program 8 times [2021-11-25 17:50:20,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:20,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585533044] [2021-11-25 17:50:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:20,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:20,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:20,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585533044] [2021-11-25 17:50:20,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585533044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:20,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073979082] [2021-11-25 17:50:20,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:50:20,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:20,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:20,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:20,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 17:50:21,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 17:50:21,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:21,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 17:50:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:21,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:21,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:21,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:50:21,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:50:21,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_627 (Array Int Int)) (v_ArrVal_628 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_627) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:50:21,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:50:21,810 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_626 (Array Int Int)) (v_ArrVal_628 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_626) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:50:21,817 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:50:21,827 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int)) (v_ArrVal_628 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:50:21,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:50:21,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_628 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_628) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 4 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:50:21,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:21,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:50:21,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:50:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 45 not checked. [2021-11-25 17:50:22,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073979082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537915528] [2021-11-25 17:50:22,043 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:22,043 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:22,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:22,043 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:22,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:22,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:22,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:22,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:22,335 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:22,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:22,478 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:50:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,577 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:22,659 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:24,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5361#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:24,019 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:24,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:24,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 50 [2021-11-25 17:50:24,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524845509] [2021-11-25 17:50:24,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:24,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 17:50:24,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 17:50:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2399, Unknown=9, NotChecked=954, Total=3540 [2021-11-25 17:50:24,021 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 50 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) [2021-11-25 17:50:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:24,888 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-25 17:50:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 17:50:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 50 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 17:50:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:24,889 INFO L225 Difference]: With dead ends: 73 [2021-11-25 17:50:24,889 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 17:50:24,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=268, Invalid=3665, Unknown=9, NotChecked=1170, Total=5112 [2021-11-25 17:50:24,890 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:24,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 216 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 368 Invalid, 0 Unknown, 252 Unchecked, 0.2s Time] [2021-11-25 17:50:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 17:50:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-25 17:50:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-25 17:50:24,893 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2021-11-25 17:50:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:24,893 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-25 17:50:24,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 50 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) [2021-11-25 17:50:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-25 17:50:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 17:50:24,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:24,895 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:24,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:25,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 17:50:25,121 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash -968064290, now seen corresponding path program 2 times [2021-11-25 17:50:25,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:25,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074454361] [2021-11-25 17:50:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:25,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:25,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074454361] [2021-11-25 17:50:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074454361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900987062] [2021-11-25 17:50:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:50:25,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:25,526 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:25,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 17:50:26,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 17:50:26,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-25 17:50:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:26,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:26,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:26,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 16 [2021-11-25 17:50:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:26,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:50:27,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900987062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486973106] [2021-11-25 17:50:27,742 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 17:50:27,742 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:27,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:27,742 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:27,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:27,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:27,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:27,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:27,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:27,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:27,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:27,988 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:27,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:28,085 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:28,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:28,163 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:28,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:28,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:30,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5819#(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 [2021-11-25 17:50:30,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:30,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:30,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2021-11-25 17:50:30,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817484312] [2021-11-25 17:50:30,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:30,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 17:50:30,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 17:50:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3118, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 17:50:30,428 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 46 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:31,800 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-11-25 17:50:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 17:50:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2021-11-25 17:50:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:31,800 INFO L225 Difference]: With dead ends: 76 [2021-11-25 17:50:31,801 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 17:50:31,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=688, Invalid=6284, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 17:50:31,802 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:31,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 103 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:50:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 17:50:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-25 17:50:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) 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) [2021-11-25 17:50:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-25 17:50:31,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-11-25 17:50:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:31,804 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-25 17:50:31,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-25 17:50:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 17:50:31,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:31,805 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 17:50:31,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:32,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 17:50:32,006 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1107595219, now seen corresponding path program 9 times [2021-11-25 17:50:32,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:32,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736078784] [2021-11-25 17:50:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:32,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:32,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736078784] [2021-11-25 17:50:32,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736078784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794051265] [2021-11-25 17:50:32,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:50:32,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:32,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:32,316 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:32,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 17:50:32,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:50:32,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 17:50:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:32,589 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:50:32,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:33,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794051265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624451827] [2021-11-25 17:50:33,829 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:33,829 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:33,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:33,829 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:33,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:33,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:33,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:33,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:34,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:34,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:34,121 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:34,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:34,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:34,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:34,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:34,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:34,280 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:34,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:34,380 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:34,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:34,476 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:35,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6287#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:35,817 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:35,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:35,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2021-11-25 17:50:35,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755298708] [2021-11-25 17:50:35,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:35,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 17:50:35,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 17:50:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2794, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 17:50:35,819 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 47 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:36,637 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-25 17:50:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 17:50:36,638 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2021-11-25 17:50:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:36,638 INFO L225 Difference]: With dead ends: 49 [2021-11-25 17:50:36,638 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 17:50:36,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 17:50:36,640 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 275 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:36,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 66 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:50:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 17:50:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-25 17:50:36,642 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) [2021-11-25 17:50:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-25 17:50:36,642 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2021-11-25 17:50:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:36,643 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-25 17:50:36,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-25 17:50:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 17:50:36,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:36,644 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 17:50:36,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:36,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 17:50:36,856 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash -857421489, now seen corresponding path program 10 times [2021-11-25 17:50:36,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:36,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272055468] [2021-11-25 17:50:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:36,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:37,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272055468] [2021-11-25 17:50:37,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272055468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:37,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868029877] [2021-11-25 17:50:37,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:50:37,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:37,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:37,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 17:50:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-25 17:50:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:37,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:38,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:38,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:39,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:39,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:39,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:39,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:39,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:39,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:40,002 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:50:40,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:50:40,026 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int)) (v_ArrVal_802 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_802) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:50:40,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:50:40,049 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_801 (Array Int Int)) (v_ArrVal_803 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_801) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:50:40,060 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:50:40,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_800 (Array Int Int)) (v_ArrVal_803 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_800) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)))) is different from false [2021-11-25 17:50:40,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_803 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:50:40,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_799 (Array Int Int)) (v_ArrVal_803 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_799) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:50:40,179 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187| Int) (v_ArrVal_803 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187|)) 0) (< |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187|) (< |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187| 0))) is different from false [2021-11-25 17:50:40,196 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187| Int) (v_ArrVal_803 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_803) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 5 |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187|)) 0) (< |c_ULTIMATE.start_cstrncpy_~src#1.offset| |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187|) (< |v_ULTIMATE.start_cstrncpy_#t~post4#1.offset_187| 0))) is different from false [2021-11-25 17:50:40,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:40,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:40,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:40,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:50:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:50:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 68 not checked. [2021-11-25 17:50:40,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868029877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:40,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993312640] [2021-11-25 17:50:40,811 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:40,811 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:40,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:40,812 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:40,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:40,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:40,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:40,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:41,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:41,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:41,098 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:41,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:41,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:41,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:41,230 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:41,353 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:41,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:41,476 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:43,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6763#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:43,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:43,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:43,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 70 [2021-11-25 17:50:43,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924513985] [2021-11-25 17:50:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:43,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-25 17:50:43,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-25 17:50:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=4474, Unknown=11, NotChecked=1584, Total=6320 [2021-11-25 17:50:43,491 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 71 states, 71 states have (on average 1.7464788732394365) internal successors, (124), 70 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:45,021 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-11-25 17:50:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 17:50:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.7464788732394365) internal successors, (124), 70 states have internal predecessors, (124), 0 states have call successors, (0), 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 [2021-11-25 17:50:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:45,022 INFO L225 Difference]: With dead ends: 81 [2021-11-25 17:50:45,022 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 17:50:45,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 11 IntricatePredicates, 2 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=381, Invalid=6792, Unknown=11, NotChecked=1936, Total=9120 [2021-11-25 17:50:45,024 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:45,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 215 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 392 Invalid, 0 Unknown, 463 Unchecked, 0.2s Time] [2021-11-25 17:50:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 17:50:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-25 17:50:45,026 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) [2021-11-25 17:50:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-25 17:50:45,027 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2021-11-25 17:50:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:45,027 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-25 17:50:45,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.7464788732394365) internal successors, (124), 70 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-25 17:50:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 17:50:45,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:45,029 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-11-25 17:50:45,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:45,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:45,244 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1077723043, now seen corresponding path program 11 times [2021-11-25 17:50:45,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:45,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428144358] [2021-11-25 17:50:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:45,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:45,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:45,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428144358] [2021-11-25 17:50:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428144358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:45,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369844302] [2021-11-25 17:50:45,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:50:45,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:45,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 17:50:45,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 17:50:45,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:45,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-25 17:50:45,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:46,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:46,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:46,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369844302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780346235] [2021-11-25 17:50:46,940 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:46,940 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:46,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:46,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:46,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:46,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:47,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:47,227 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:47,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:47,360 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,490 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:47,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:47,563 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:48,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7269#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:48,852 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:48,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:48,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2021-11-25 17:50:48,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456046660] [2021-11-25 17:50:48,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:48,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 17:50:48,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 17:50:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2654, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 17:50:48,855 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 45 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:49,666 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-25 17:50:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 17:50:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 45 states have internal predecessors, (130), 0 states have call successors, (0), 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 [2021-11-25 17:50:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:49,667 INFO L225 Difference]: With dead ends: 56 [2021-11-25 17:50:49,667 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 17:50:49,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=808, Invalid=4304, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 17:50:49,668 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 355 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:49,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 68 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:50:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 17:50:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-25 17:50:49,673 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) [2021-11-25 17:50:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-25 17:50:49,673 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2021-11-25 17:50:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-25 17:50:49,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 45 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-25 17:50:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 17:50:49,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:49,680 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-11-25 17:50:49,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:49,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 17:50:49,901 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2006844545, now seen corresponding path program 12 times [2021-11-25 17:50:49,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:49,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460726170] [2021-11-25 17:50:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:49,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:50,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460726170] [2021-11-25 17:50:50,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460726170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:50,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499938227] [2021-11-25 17:50:50,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:50:50,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:50,918 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:50,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 17:50:51,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:50:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:50:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-25 17:50:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:51,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:51,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:51,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:51,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:51,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:52,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:52,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:50:52,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2021-11-25 17:50:52,166 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int)) (v_ArrVal_940 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_940) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:50:52,176 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:50:52,189 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int)) (v_ArrVal_939 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_939) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:50:52,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:50:52,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int)) (v_ArrVal_938 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_938) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:50:52,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:50:52,243 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int)) (v_ArrVal_937 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_937) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:50:52,254 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:50:52,267 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int)) (v_ArrVal_936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_936) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:50:52,278 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:50:52,285 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_941) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:50:52,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:52,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:50:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:50:52,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:50:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 98 not checked. [2021-11-25 17:50:52,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499938227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052055339] [2021-11-25 17:50:52,616 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:52,616 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:52,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:52,617 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:52,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:52,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:52,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:52,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:52,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:52,939 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:52,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:53,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:53,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:53,105 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:53,223 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:53,313 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:54,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7800#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:54,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:54,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:54,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 26] total 65 [2021-11-25 17:50:54,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984824001] [2021-11-25 17:50:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:54,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 17:50:54,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 17:50:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3602, Unknown=13, NotChecked=1716, Total=5550 [2021-11-25 17:50:54,826 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 66 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 65 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:56,191 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-11-25 17:50:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 17:50:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 65 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2021-11-25 17:50:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:56,192 INFO L225 Difference]: With dead ends: 93 [2021-11-25 17:50:56,192 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 17:50:56,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 88 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=314, Invalid=5577, Unknown=13, NotChecked=2106, Total=8010 [2021-11-25 17:50:56,193 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 717 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:56,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 233 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1055 Invalid, 0 Unknown, 717 Unchecked, 0.5s Time] [2021-11-25 17:50:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 17:50:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-11-25 17:50:56,195 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) [2021-11-25 17:50:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-25 17:50:56,196 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2021-11-25 17:50:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:56,196 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-25 17:50:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 65 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:50:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-25 17:50:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 17:50:56,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:56,197 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 17:50:56,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:56,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-25 17:50:56,397 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:50:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:56,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1814822571, now seen corresponding path program 13 times [2021-11-25 17:50:56,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:56,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290125065] [2021-11-25 17:50:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:56,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 25 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:56,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290125065] [2021-11-25 17:50:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290125065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055256203] [2021-11-25 17:50:56,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:50:56,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:56,853 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:56,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 17:50:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-25 17:50:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:57,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:50:57,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:57,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055256203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:50:57,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751116303] [2021-11-25 17:50:57,939 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:50:57,940 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:50:57,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:50:57,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:50:57,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:50:57,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:50:57,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:58,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:58,269 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:50:58,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:50:58,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:58,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:50:58,430 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:50:58,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,546 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:50:58,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:50:58,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:50:59,952 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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:50:59,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:50:59,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:50:59,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 41 [2021-11-25 17:50:59,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024545937] [2021-11-25 17:50:59,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:50:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 17:50:59,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 17:50:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 17:50:59,955 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) [2021-11-25 17:51:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:00,870 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-11-25 17:51:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 17:51:00,871 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 [2021-11-25 17:51:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:00,871 INFO L225 Difference]: With dead ends: 63 [2021-11-25 17:51:00,871 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 17:51:00,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 17:51:00,872 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 418 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:00,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 104 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 17:51:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-11-25 17:51:00,875 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) [2021-11-25 17:51:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-25 17:51:00,875 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2021-11-25 17:51:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-25 17:51:00,876 INFO L471 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) [2021-11-25 17:51:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-25 17:51:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 17:51:00,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:00,877 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 17:51:00,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:01,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:01,081 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 147382647, now seen corresponding path program 14 times [2021-11-25 17:51:01,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551384328] [2021-11-25 17:51:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:01,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:02,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551384328] [2021-11-25 17:51:02,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551384328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253473616] [2021-11-25 17:51:02,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:51:02,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:02,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:02,309 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:02,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 17:51:03,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 17:51:03,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:03,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-25 17:51:03,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:04,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:04,191 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:51:04,198 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:51:04,208 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int)) (v_ArrVal_1095 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1095) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:51:04,215 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:04,225 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int)) (v_ArrVal_1094 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1094) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:04,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:04,242 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1093 (Array Int Int)) (v_ArrVal_1096 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1093) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:04,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)))) is different from false [2021-11-25 17:51:04,260 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1092 (Array Int Int)) (v_ArrVal_1096 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1092) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:04,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:04,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1091 (Array Int Int)) (v_ArrVal_1096 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1091) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:04,285 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:04,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1090 (Array Int Int)) (v_ArrVal_1096 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1090) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:04,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)))) is different from false [2021-11-25 17:51:04,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1096 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:51:04,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:04,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:04,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:51:04,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 132 not checked. [2021-11-25 17:51:04,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253473616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:04,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239673878] [2021-11-25 17:51:04,591 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:04,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:04,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:04,592 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:04,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:04,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:04,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:04,836 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:04,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:04,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:04,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:04,980 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:51:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:05,116 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:05,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:05,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:07,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8964#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:51:07,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:07,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:07,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29, 29] total 74 [2021-11-25 17:51:07,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925760900] [2021-11-25 17:51:07,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:07,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-25 17:51:07,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:07,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-25 17:51:07,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=4493, Unknown=15, NotChecked=2220, Total=6972 [2021-11-25 17:51:07,295 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 75 states, 75 states have (on average 1.88) internal successors, (141), 74 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) [2021-11-25 17:51:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:09,035 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2021-11-25 17:51:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 17:51:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.88) internal successors, (141), 74 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 60 [2021-11-25 17:51:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:09,036 INFO L225 Difference]: With dead ends: 105 [2021-11-25 17:51:09,036 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 17:51:09,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 129 SyntacticMatches, 16 SemanticMatches, 99 ConstructedPredicates, 15 IntricatePredicates, 1 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=353, Invalid=7002, Unknown=15, NotChecked=2730, Total=10100 [2021-11-25 17:51:09,037 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:09,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 304 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1065 Invalid, 0 Unknown, 597 Unchecked, 0.5s Time] [2021-11-25 17:51:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 17:51:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-25 17:51:09,039 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) [2021-11-25 17:51:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-25 17:51:09,039 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2021-11-25 17:51:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:09,040 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-25 17:51:09,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.88) internal successors, (141), 74 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) [2021-11-25 17:51:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-25 17:51:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:51:09,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:09,041 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2021-11-25 17:51:09,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-25 17:51:09,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:09,248 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1409731381, now seen corresponding path program 15 times [2021-11-25 17:51:09,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:09,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315557957] [2021-11-25 17:51:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:09,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 36 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:09,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315557957] [2021-11-25 17:51:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315557957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581214515] [2021-11-25 17:51:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:51:09,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:09,730 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 17:51:10,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:51:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-25 17:51:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:10,162 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:51:10,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 49 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:11,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 64 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:11,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581214515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:11,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069298412] [2021-11-25 17:51:11,977 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:11,977 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:11,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:11,978 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:11,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:11,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:12,252 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:12,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:12,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:12,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:12,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:12,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:12,383 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:51:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,471 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:12,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:12,553 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:14,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9619#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:51:14,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:14,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:14,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2021-11-25 17:51:14,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508574728] [2021-11-25 17:51:14,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:14,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-25 17:51:14,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-25 17:51:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=4900, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 17:51:14,068 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 65 states, 64 states have (on average 2.90625) internal successors, (186), 64 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:15,115 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-25 17:51:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 17:51:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.90625) internal successors, (186), 64 states have internal predecessors, (186), 0 states have call successors, (0), 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 [2021-11-25 17:51:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:15,116 INFO L225 Difference]: With dead ends: 70 [2021-11-25 17:51:15,116 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 17:51:15,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1338, Invalid=7592, Unknown=0, NotChecked=0, Total=8930 [2021-11-25 17:51:15,118 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 286 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:15,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 124 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 17:51:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-11-25 17:51:15,120 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) [2021-11-25 17:51:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-25 17:51:15,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2021-11-25 17:51:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-25 17:51:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.90625) internal successors, (186), 64 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-25 17:51:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 17:51:15,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:15,122 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2021-11-25 17:51:15,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:15,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 17:51:15,336 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash -43483305, now seen corresponding path program 16 times [2021-11-25 17:51:15,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:15,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423446500] [2021-11-25 17:51:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:15,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:16,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423446500] [2021-11-25 17:51:16,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423446500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764937122] [2021-11-25 17:51:16,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:51:16,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:16,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:16,769 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:16,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 17:51:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-25 17:51:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:16,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:17,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:17,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:17,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:17,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:17,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:18,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:18,263 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:51:18,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:51:18,285 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1269 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1269) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:51:18,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:18,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1268 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1268) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:18,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:18,332 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1267) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:18,341 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:18,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1266 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1266) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:18,363 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:18,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)))) is different from false [2021-11-25 17:51:18,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)))) is different from false [2021-11-25 17:51:18,413 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1264 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1264) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:18,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:51:18,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1263 (Array Int Int)) (v_ArrVal_1270 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1263) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:51:18,446 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:51:18,452 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1270 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1270) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 8 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:51:18,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:18,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:18,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:51:18,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 171 not checked. [2021-11-25 17:51:18,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764937122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:18,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249053658] [2021-11-25 17:51:18,752 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:18,752 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:18,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:18,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:18,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:18,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:19,031 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:19,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:19,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:19,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:19,187 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:51:19,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:19,285 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:19,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:19,393 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:21,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10284#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:51:21,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:21,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:21,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32, 32] total 79 [2021-11-25 17:51:21,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369898696] [2021-11-25 17:51:21,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:21,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-25 17:51:21,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-25 17:51:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4908, Unknown=17, NotChecked=2652, Total=7832 [2021-11-25 17:51:21,115 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) [2021-11-25 17:51:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:23,120 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-11-25 17:51:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 17:51:23,120 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 [2021-11-25 17:51:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:23,121 INFO L225 Difference]: With dead ends: 117 [2021-11-25 17:51:23,121 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 17:51:23,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 149 SyntacticMatches, 18 SemanticMatches, 106 ConstructedPredicates, 17 IntricatePredicates, 1 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=382, Invalid=7859, Unknown=17, NotChecked=3298, Total=11556 [2021-11-25 17:51:23,121 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:23,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 412 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1044 Invalid, 0 Unknown, 693 Unchecked, 0.4s Time] [2021-11-25 17:51:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 17:51:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-25 17:51:23,123 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) [2021-11-25 17:51:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-25 17:51:23,123 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2021-11-25 17:51:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:23,123 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-25 17:51:23,124 INFO L471 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) [2021-11-25 17:51:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-25 17:51:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 17:51:23,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:23,124 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2021-11-25 17:51:23,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:23,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-25 17:51:23,325 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2074576259, now seen corresponding path program 17 times [2021-11-25 17:51:23,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:23,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663527564] [2021-11-25 17:51:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:23,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 49 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:23,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663527564] [2021-11-25 17:51:23,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663527564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142479322] [2021-11-25 17:51:23,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:51:23,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:23,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:23,789 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:23,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 17:51:25,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-25 17:51:25,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:25,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-25 17:51:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:25,749 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:51:25,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 64 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:26,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 81 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:27,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142479322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831424901] [2021-11-25 17:51:27,917 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:27,917 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:27,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:27,917 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:27,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:27,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:28,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:28,226 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:28,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:28,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:28,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:28,367 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:51:28,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,485 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:28,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:28,613 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:30,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11012#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:51:30,591 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:30,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:30,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2021-11-25 17:51:30,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145406392] [2021-11-25 17:51:30,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:30,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-25 17:51:30,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-25 17:51:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=5652, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 17:51:30,593 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 71 states, 70 states have (on average 2.9571428571428573) internal successors, (207), 70 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:32,097 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-11-25 17:51:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 17:51:32,098 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.9571428571428573) internal successors, (207), 70 states have internal predecessors, (207), 0 states have call successors, (0), 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 [2021-11-25 17:51:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:32,098 INFO L225 Difference]: With dead ends: 77 [2021-11-25 17:51:32,098 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 17:51:32,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2836 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1777, Invalid=8729, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 17:51:32,099 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 422 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:32,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 127 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:51:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 17:51:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-11-25 17:51:32,102 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) [2021-11-25 17:51:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-25 17:51:32,102 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2021-11-25 17:51:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:32,103 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-25 17:51:32,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.9571428571428573) internal successors, (207), 70 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-25 17:51:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 17:51:32,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:32,104 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-25 17:51:32,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:32,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:32,310 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2010652257, now seen corresponding path program 18 times [2021-11-25 17:51:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:32,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932009832] [2021-11-25 17:51:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:32,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:33,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:33,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932009832] [2021-11-25 17:51:33,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932009832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:33,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557579150] [2021-11-25 17:51:33,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:51:33,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:33,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:33,739 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:33,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 17:51:34,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:51:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 175 conjunts are in the unsatisfiable core [2021-11-25 17:51:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:34,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:34,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:35,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:35,598 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:51:35,605 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2021-11-25 17:51:35,614 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int)) (v_ArrVal_1460 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1460) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:51:35,621 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:35,631 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1459 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1459) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:35,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:35,647 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1458 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1458) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:35,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:35,664 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1457 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1457) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:35,671 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:35,680 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1456 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1456) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:35,688 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:35,697 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1455 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1455) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:35,704 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:51:35,714 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1454 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1454) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:51:35,721 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:51:35,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1453 (Array Int Int)) (v_ArrVal_1461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1453) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:51:35,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:51:35,742 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1461) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:51:35,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:35,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:35,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:35,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:51:35,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 29 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 215 not checked. [2021-11-25 17:51:36,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557579150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:36,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77969633] [2021-11-25 17:51:36,035 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:36,035 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:36,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:36,036 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:36,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:36,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:36,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:36,304 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:36,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:36,489 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:51:36,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,605 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:36,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:36,691 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:38,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11745#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:51:38,401 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:38,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:38,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 35, 35] total 87 [2021-11-25 17:51:38,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9034855] [2021-11-25 17:51:38,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:38,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-25 17:51:38,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-25 17:51:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5786, Unknown=19, NotChecked=3230, Total=9312 [2021-11-25 17:51:38,404 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) [2021-11-25 17:51:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:41,233 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2021-11-25 17:51:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 17:51:41,234 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 [2021-11-25 17:51:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:41,234 INFO L225 Difference]: With dead ends: 129 [2021-11-25 17:51:41,234 INFO L226 Difference]: Without dead ends: 78 [2021-11-25 17:51:41,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 166 SyntacticMatches, 22 SemanticMatches, 118 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=447, Invalid=9710, Unknown=19, NotChecked=4104, Total=14280 [2021-11-25 17:51:41,236 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1239 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:41,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 399 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1915 Invalid, 0 Unknown, 1239 Unchecked, 0.8s Time] [2021-11-25 17:51:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-25 17:51:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-25 17:51:41,238 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) [2021-11-25 17:51:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-11-25 17:51:41,239 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2021-11-25 17:51:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:41,239 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-11-25 17:51:41,240 INFO L471 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) [2021-11-25 17:51:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-11-25 17:51:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 17:51:41,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:41,241 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 17:51:41,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:41,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-25 17:51:41,452 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1992937971, now seen corresponding path program 19 times [2021-11-25 17:51:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354440599] [2021-11-25 17:51:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:41,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 64 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:42,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354440599] [2021-11-25 17:51:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354440599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288831961] [2021-11-25 17:51:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:51:42,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:42,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:42,004 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:42,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 17:51:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 17:51:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:42,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:43,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 81 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:43,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288831961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:43,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179947148] [2021-11-25 17:51:43,398 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:43,398 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:43,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:43,399 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:43,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:43,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:43,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:43,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:43,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:43,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:43,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:43,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:43,709 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:43,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:43,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:43,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:43,906 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:51:43,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:44,018 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:44,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:44,128 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:51:45,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12530#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:51:45,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:51:45,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:45,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 53 [2021-11-25 17:51:45,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753336932] [2021-11-25 17:51:45,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:45,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-25 17:51:45,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-25 17:51:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3657, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 17:51:45,609 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) [2021-11-25 17:51:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:46,945 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-25 17:51:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 17:51:46,946 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 [2021-11-25 17:51:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:46,947 INFO L225 Difference]: With dead ends: 84 [2021-11-25 17:51:46,947 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 17:51:46,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1251, Invalid=6581, Unknown=0, NotChecked=0, Total=7832 [2021-11-25 17:51:46,947 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 701 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:46,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 173 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:51:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 17:51:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-11-25 17:51:46,949 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) [2021-11-25 17:51:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-25 17:51:46,950 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2021-11-25 17:51:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:46,950 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-25 17:51:46,951 INFO L471 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) [2021-11-25 17:51:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-25 17:51:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 17:51:46,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:46,951 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 17:51:46,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:47,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 17:51:47,152 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:51:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:47,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1582048465, now seen corresponding path program 20 times [2021-11-25 17:51:47,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:47,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783137152] [2021-11-25 17:51:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:47,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:48,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783137152] [2021-11-25 17:51:48,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783137152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273362628] [2021-11-25 17:51:48,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:51:48,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:48,766 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 17:51:52,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-25 17:51:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 244 conjunts are in the unsatisfiable core [2021-11-25 17:51:52,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:52,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:53,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:53,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:54,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:54,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:54,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:54,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:55,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:55,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:55,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:56,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:56,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:56,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:56,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:56,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:51:56,286 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2021-11-25 17:51:56,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (v_ArrVal_1665 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1665) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:51:56,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:56,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (v_ArrVal_1664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1664) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:51:56,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:56,345 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (v_ArrVal_1663 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1663) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:51:56,356 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:56,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (v_ArrVal_1662 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1662) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:51:56,377 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:56,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (v_ArrVal_1661 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1661) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:51:56,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:56,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int)) (v_ArrVal_1660 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1660) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:51:56,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:51:56,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1659 (Array Int Int)) (v_ArrVal_1666 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1659) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:51:56,446 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:51:56,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1658 (Array Int Int)) (v_ArrVal_1666 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1658) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:51:56,468 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:51:56,480 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1657 (Array Int Int)) (v_ArrVal_1666 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1657) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:51:56,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:51:56,496 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1666) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 10 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)))) is different from false [2021-11-25 17:51:56,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:56,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:56,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:51:56,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:51:56,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:51:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 32 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 264 not checked. [2021-11-25 17:51:57,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273362628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778651645] [2021-11-25 17:51:57,327 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:51:57,327 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:57,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:51:57,327 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:51:57,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:51:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:51:57,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:57,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:57,586 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:51:57,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:57,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:57,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:57,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:51:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:57,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:51:57,731 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:51:57,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,855 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:51:57,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:51:57,978 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:00,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13354#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:52:00,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:00,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:00,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38, 38] total 118 [2021-11-25 17:52:00,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968600634] [2021-11-25 17:52:00,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:00,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-25 17:52:00,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-25 17:52:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=11010, Unknown=21, NotChecked=4830, Total=16256 [2021-11-25 17:52:00,386 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 119 states, 119 states have (on average 1.9243697478991597) internal successors, (229), 118 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:03,263 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-11-25 17:52:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 17:52:03,263 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9243697478991597) internal successors, (229), 118 states have internal predecessors, (229), 0 states have call successors, (0), 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 [2021-11-25 17:52:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:03,264 INFO L225 Difference]: With dead ends: 141 [2021-11-25 17:52:03,264 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 17:52:03,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 159 ConstructedPredicates, 21 IntricatePredicates, 10 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=624, Invalid=18899, Unknown=21, NotChecked=6216, Total=25760 [2021-11-25 17:52:03,265 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1726 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:03,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 658 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1169 Invalid, 0 Unknown, 1726 Unchecked, 0.5s Time] [2021-11-25 17:52:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 17:52:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-25 17:52:03,267 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) [2021-11-25 17:52:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-25 17:52:03,268 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2021-11-25 17:52:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:03,268 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-25 17:52:03,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9243697478991597) internal successors, (229), 118 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-25 17:52:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 17:52:03,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:03,269 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2021-11-25 17:52:03,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:03,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 17:52:03,469 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:52:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1541842011, now seen corresponding path program 21 times [2021-11-25 17:52:03,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:03,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706602297] [2021-11-25 17:52:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:03,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 81 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:04,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706602297] [2021-11-25 17:52:04,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706602297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583060348] [2021-11-25 17:52:04,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:52:04,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:04,121 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:04,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 17:52:05,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:52:05,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-25 17:52:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:05,415 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:52:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 100 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:06,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 121 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:07,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583060348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:07,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847005511] [2021-11-25 17:52:07,748 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:52:07,748 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:07,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:07,748 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:07,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:07,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:07,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:52:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:07,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:07,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:08,014 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:52:08,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:08,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:08,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:08,167 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:52:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:08,264 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:52:08,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:08,344 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:09,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14236#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:52:09,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:09,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:09,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2021-11-25 17:52:09,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284781018] [2021-11-25 17:52:09,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:09,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-25 17:52:09,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:09,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-25 17:52:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=6884, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 17:52:09,960 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 79 states, 78 states have (on average 3.1794871794871793) internal successors, (248), 78 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:11,333 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-25 17:52:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 17:52:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.1794871794871793) internal successors, (248), 78 states have internal predecessors, (248), 0 states have call successors, (0), 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 [2021-11-25 17:52:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:11,335 INFO L225 Difference]: With dead ends: 91 [2021-11-25 17:52:11,335 INFO L226 Difference]: Without dead ends: 91 [2021-11-25 17:52:11,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3823 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2102, Invalid=11008, Unknown=0, NotChecked=0, Total=13110 [2021-11-25 17:52:11,336 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 473 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:11,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 193 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:52:11,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-25 17:52:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-11-25 17:52:11,338 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) [2021-11-25 17:52:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-11-25 17:52:11,338 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2021-11-25 17:52:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:11,339 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-11-25 17:52:11,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.1794871794871793) internal successors, (248), 78 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-11-25 17:52:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 17:52:11,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:11,340 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2021-11-25 17:52:11,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:11,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-25 17:52:11,548 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:52:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1723708985, now seen corresponding path program 22 times [2021-11-25 17:52:11,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428263417] [2021-11-25 17:52:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:11,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:13,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:13,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428263417] [2021-11-25 17:52:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428263417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:13,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804466402] [2021-11-25 17:52:13,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:52:13,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:13,470 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:13,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 17:52:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:13,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-25 17:52:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:13,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:14,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:14,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:14,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:14,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:14,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:14,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:15,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:15,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:52:15,435 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:52:15,457 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int)) (v_ArrVal_1890 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1890) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:52:15,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:52:15,473 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1889 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1889) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:52:15,480 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:52:15,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1888 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1888) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:52:15,496 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:52:15,505 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1887 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1887) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:52:15,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:52:15,535 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1886 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1886) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:52:15,544 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:52:15,556 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1885 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1885) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:52:15,565 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:52:15,577 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1884 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1884) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:52:15,586 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:52:15,596 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1883 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1883) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:52:15,605 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:52:15,615 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1882 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1882) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:52:15,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:52:15,632 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1881 (Array Int Int)) (v_ArrVal_1891 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1881) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:52:15,639 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)))) is different from false [2021-11-25 17:52:15,643 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1891 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1891) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 11 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:52:15,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:52:15,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:15,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:52:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:52:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:52:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 35 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 318 not checked. [2021-11-25 17:52:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804466402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246740474] [2021-11-25 17:52:15,971 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:52:15,972 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:15,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:15,972 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:15,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:15,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:52:16,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:16,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:16,228 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:52:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:16,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:16,392 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:52:16,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,469 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:52:16,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:16,550 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:18,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15105#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:52:18,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:18,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:18,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 41, 41] total 103 [2021-11-25 17:52:18,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158877990] [2021-11-25 17:52:18,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:18,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-25 17:52:18,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-25 17:52:18,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=7758, Unknown=23, NotChecked=4554, Total=12656 [2021-11-25 17:52:18,429 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 104 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 103 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:21,645 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2021-11-25 17:52:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-25 17:52:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 103 states have internal predecessors, (204), 0 states have call successors, (0), 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 [2021-11-25 17:52:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:21,647 INFO L225 Difference]: With dead ends: 153 [2021-11-25 17:52:21,647 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 17:52:21,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 200 SyntacticMatches, 25 SemanticMatches, 135 ConstructedPredicates, 23 IntricatePredicates, 1 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=467, Invalid=12484, Unknown=23, NotChecked=5658, Total=18632 [2021-11-25 17:52:21,648 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1526 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:21,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 618 Invalid, 3809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2254 Invalid, 0 Unknown, 1526 Unchecked, 0.9s Time] [2021-11-25 17:52:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 17:52:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-25 17:52:21,649 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) [2021-11-25 17:52:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-11-25 17:52:21,650 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2021-11-25 17:52:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:21,650 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-11-25 17:52:21,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 103 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-11-25 17:52:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 17:52:21,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:21,651 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2021-11-25 17:52:21,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:21,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-25 17:52:21,852 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:52:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 163518235, now seen corresponding path program 23 times [2021-11-25 17:52:21,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407526280] [2021-11-25 17:52:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:21,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 100 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:22,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407526280] [2021-11-25 17:52:22,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407526280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915167130] [2021-11-25 17:52:22,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:22,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:22,597 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:22,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 17:52:26,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-25 17:52:26,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-25 17:52:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:26,751 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:52:26,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 121 proven. 377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:27,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 144 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:29,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915167130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:29,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344611066] [2021-11-25 17:52:29,605 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:52:29,605 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:29,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:29,606 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:29,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:52:29,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:29,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:29,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:29,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:29,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:29,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:29,871 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:52:29,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:29,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:29,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:30,004 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:52:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:30,105 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:52:30,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:30,192 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:31,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16051#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:52:31,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:31,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:31,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2021-11-25 17:52:31,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148625466] [2021-11-25 17:52:31,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:31,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-25 17:52:31,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-25 17:52:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=8463, Unknown=0, NotChecked=0, Total=9506 [2021-11-25 17:52:31,812 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) [2021-11-25 17:52:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:33,976 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-11-25 17:52:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-25 17:52:33,977 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 [2021-11-25 17:52:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:33,980 INFO L225 Difference]: With dead ends: 98 [2021-11-25 17:52:33,981 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 17:52:33,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4459 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2794, Invalid=13208, Unknown=0, NotChecked=0, Total=16002 [2021-11-25 17:52:33,984 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 384 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:33,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 203 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:52:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 17:52:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-25 17:52:33,987 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) [2021-11-25 17:52:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-11-25 17:52:33,988 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2021-11-25 17:52:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:33,990 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-11-25 17:52:33,990 INFO L471 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) [2021-11-25 17:52:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-11-25 17:52:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:52:33,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:33,991 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2021-11-25 17:52:33,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:34,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-25 17:52:34,199 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:52:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1568436473, now seen corresponding path program 24 times [2021-11-25 17:52:34,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:34,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747300402] [2021-11-25 17:52:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:34,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:36,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747300402] [2021-11-25 17:52:36,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747300402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754334938] [2021-11-25 17:52:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:52:36,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:36,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:36,251 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:36,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 17:52:37,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:52:37,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:37,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 218 conjunts are in the unsatisfiable core [2021-11-25 17:52:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:37,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:38,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:39,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:39,508 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:52:39,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:52:39,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int)) (v_ArrVal_2131 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2131) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:52:39,538 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:52:39,551 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int)) (v_ArrVal_2130 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2130) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:52:39,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:52:39,572 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2129 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2129) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:52:39,582 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:52:39,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2128 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2128) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:52:39,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:52:39,617 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2127 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2127) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:52:39,627 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:52:39,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2126 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2126) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:52:39,651 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:52:39,664 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2125 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2125) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:52:39,674 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:52:39,688 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2124 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2124) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:52:39,698 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:52:39,711 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2123 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2123) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:52:39,721 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:52:39,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2122 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2122) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:52:39,738 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:52:39,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2121 (Array Int Int)) (v_ArrVal_2132 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2121) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:52:39,761 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:52:39,767 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2132 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2132) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 12 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:52:39,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:52:39,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:39,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:52:39,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:52:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:52:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 38 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 377 not checked. [2021-11-25 17:52:40,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754334938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:40,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961850142] [2021-11-25 17:52:40,139 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:52:40,139 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:40,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:40,140 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:40,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:52:40,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:40,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:40,412 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:52:40,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:40,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:40,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:40,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:40,563 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:52:40,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,665 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:52:40,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:40,780 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:42,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16988#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:52:42,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:42,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 44, 44] total 111 [2021-11-25 17:52:42,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044673706] [2021-11-25 17:52:42,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:42,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-25 17:52:42,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-25 17:52:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=8852, Unknown=25, NotChecked=5300, Total=14520 [2021-11-25 17:52:42,721 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 111 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:46,553 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2021-11-25 17:52:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 17:52:46,553 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 111 states have internal predecessors, (221), 0 states have call successors, (0), 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 [2021-11-25 17:52:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:46,554 INFO L225 Difference]: With dead ends: 165 [2021-11-25 17:52:46,554 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 17:52:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 217 SyntacticMatches, 27 SemanticMatches, 145 ConstructedPredicates, 25 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=514, Invalid=14323, Unknown=25, NotChecked=6600, Total=21462 [2021-11-25 17:52:46,555 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 4284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1620 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:46,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 732 Invalid, 4284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2626 Invalid, 0 Unknown, 1620 Unchecked, 1.1s Time] [2021-11-25 17:52:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 17:52:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-25 17:52:46,558 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) [2021-11-25 17:52:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-11-25 17:52:46,559 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2021-11-25 17:52:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:46,559 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-11-25 17:52:46,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 111 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-11-25 17:52:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 17:52:46,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:46,560 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1] [2021-11-25 17:52:46,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:46,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:46,776 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:52:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1431886643, now seen corresponding path program 25 times [2021-11-25 17:52:46,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:46,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719509681] [2021-11-25 17:52:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:46,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 121 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:47,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719509681] [2021-11-25 17:52:47,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719509681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135464825] [2021-11-25 17:52:47,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:52:47,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:47,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:47,474 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:47,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 17:52:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-25 17:52:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:48,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 144 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135464825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182054192] [2021-11-25 17:52:49,439 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:52:49,439 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:49,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:49,440 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:49,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:49,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:52:49,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:49,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:49,717 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:52:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:49,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:52:49,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:49,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:52:49,861 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:52:49,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:49,943 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:52:49,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:52:50,024 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:51,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17979#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:52:51,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:51,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:51,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 65 [2021-11-25 17:52:51,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035495010] [2021-11-25 17:52:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:51,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-25 17:52:51,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-25 17:52:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=5160, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 17:52:51,559 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) [2021-11-25 17:52:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:53,413 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2021-11-25 17:52:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 17:52:53,413 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 [2021-11-25 17:52:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:53,414 INFO L225 Difference]: With dead ends: 105 [2021-11-25 17:52:53,414 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 17:52:53,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1860, Invalid=9482, Unknown=0, NotChecked=0, Total=11342 [2021-11-25 17:52:53,415 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 351 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:53,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 263 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:52:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 17:52:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-11-25 17:52:53,417 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) [2021-11-25 17:52:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-25 17:52:53,418 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 97 [2021-11-25 17:52:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-25 17:52:53,419 INFO L471 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) [2021-11-25 17:52:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-25 17:52:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:52:53,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:53,420 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-25 17:52:53,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-25 17:52:53,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:53,632 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:52:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1297652207, now seen corresponding path program 26 times [2021-11-25 17:52:53,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:53,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945678710] [2021-11-25 17:52:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:53,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:55,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945678710] [2021-11-25 17:52:55,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945678710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497088065] [2021-11-25 17:52:55,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:55,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:55,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:55,937 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:55,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 17:53:06,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-25 17:53:06,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:06,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 239 conjunts are in the unsatisfiable core [2021-11-25 17:53:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:07,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:07,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:08,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:09,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:09,426 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:53:09,433 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2021-11-25 17:53:09,442 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2388 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2388) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:53:09,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:53:09,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2387 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2387) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:53:09,465 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:53:09,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2386 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2386) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)))) is different from false [2021-11-25 17:53:09,482 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:53:09,491 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2385 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2385) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:53:09,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:53:09,507 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2384 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2384) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:53:09,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:53:09,537 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2383 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2383) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:53:09,545 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:53:09,555 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2382 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2382) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:53:09,562 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:53:09,571 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2381 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2381) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:53:09,578 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:53:09,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2380 (Array Int Int)) (v_ArrVal_2389 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2380) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:53:09,595 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:53:09,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2379 (Array Int Int)) (v_ArrVal_2389 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2379) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:53:09,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:53:09,625 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2378 (Array Int Int)) (v_ArrVal_2389 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2378) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:53:09,632 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:53:09,641 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int)) (v_ArrVal_2377 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2377) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:53:09,649 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:53:09,653 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2389) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 13 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:53:09,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:53:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:09,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:53:09,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:53:09,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:53:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 41 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 441 not checked. [2021-11-25 17:53:10,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497088065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99290784] [2021-11-25 17:53:10,027 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:53:10,027 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:53:10,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:53:10,027 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:53:10,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:53:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:10,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:53:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:10,272 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:53:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:10,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:10,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:10,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:10,429 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:53:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,557 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:53:10,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:10,662 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:53:13,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18986#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:53:13,198 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:53:13,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:53:13,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 47, 47] total 121 [2021-11-25 17:53:13,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371625528] [2021-11-25 17:53:13,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:53:13,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-25 17:53:13,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:53:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-25 17:53:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=10420, Unknown=27, NotChecked=6210, Total=17030 [2021-11-25 17:53:13,200 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 122 states, 122 states have (on average 1.9836065573770492) internal successors, (242), 121 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) [2021-11-25 17:53:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:17,602 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2021-11-25 17:53:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-25 17:53:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.9836065573770492) internal successors, (242), 121 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 102 [2021-11-25 17:53:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:17,603 INFO L225 Difference]: With dead ends: 177 [2021-11-25 17:53:17,603 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 17:53:17,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 232 SyntacticMatches, 27 SemanticMatches, 159 ConstructedPredicates, 27 IntricatePredicates, 1 DeprecatedPredicates, 4730 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=572, Invalid=17331, Unknown=27, NotChecked=7830, Total=25760 [2021-11-25 17:53:17,604 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2985 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 4955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1929 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:17,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 793 Invalid, 4955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2985 Invalid, 0 Unknown, 1929 Unchecked, 1.2s Time] [2021-11-25 17:53:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 17:53:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-25 17:53:17,607 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) [2021-11-25 17:53:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-25 17:53:17,608 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2021-11-25 17:53:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:17,608 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-25 17:53:17,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.9836065573770492) internal successors, (242), 121 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) [2021-11-25 17:53:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-25 17:53:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 17:53:17,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:17,610 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2021-11-25 17:53:17,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-25 17:53:17,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-25 17:53:17,812 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:53:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1693025347, now seen corresponding path program 27 times [2021-11-25 17:53:17,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391457990] [2021-11-25 17:53:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:17,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 144 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:18,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391457990] [2021-11-25 17:53:18,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391457990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:53:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024421868] [2021-11-25 17:53:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:53:18,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:18,717 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:18,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 17:53:20,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:53:20,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-25 17:53:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:20,766 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:53:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 169 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 196 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:24,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024421868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851052042] [2021-11-25 17:53:24,060 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:53:24,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:53:24,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:53:24,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:53:24,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:53:24,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:24,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:53:24,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:24,330 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:53:24,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:24,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:24,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:24,491 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:53:24,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,574 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:53:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:24,657 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:53:26,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20076#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:53:26,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:53:26,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:53:26,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 95 [2021-11-25 17:53:26,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936554177] [2021-11-25 17:53:26,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:53:26,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-25 17:53:26,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:53:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-25 17:53:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=9998, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 17:53:26,425 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 97 states, 96 states have (on average 3.2395833333333335) internal successors, (311), 96 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:28,465 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-11-25 17:53:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 17:53:28,465 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 3.2395833333333335) internal successors, (311), 96 states have internal predecessors, (311), 0 states have call successors, (0), 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 [2021-11-25 17:53:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:28,466 INFO L225 Difference]: With dead ends: 112 [2021-11-25 17:53:28,466 INFO L226 Difference]: Without dead ends: 112 [2021-11-25 17:53:28,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3107, Invalid=16075, Unknown=0, NotChecked=0, Total=19182 [2021-11-25 17:53:28,468 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 645 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:28,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 335 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 17:53:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-25 17:53:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-11-25 17:53:28,470 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) [2021-11-25 17:53:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-11-25 17:53:28,471 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2021-11-25 17:53:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:28,472 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-11-25 17:53:28,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 3.2395833333333335) internal successors, (311), 96 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-11-25 17:53:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 17:53:28,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:28,473 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-25 17:53:28,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:28,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-25 17:53:28,677 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:53:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash -166257953, now seen corresponding path program 28 times [2021-11-25 17:53:28,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:28,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009018131] [2021-11-25 17:53:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:28,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 44 proven. 707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:31,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009018131] [2021-11-25 17:53:31,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009018131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:53:31,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830937280] [2021-11-25 17:53:31,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:53:31,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:31,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:31,104 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:31,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 17:53:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 248 conjunts are in the unsatisfiable core [2021-11-25 17:53:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:32,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:32,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:32,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:32,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 44 proven. 707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:33,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:33,838 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:53:33,848 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:53:33,862 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int)) (v_ArrVal_2663 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2663) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:53:33,872 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:53:33,887 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int)) (v_ArrVal_2662 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2662) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:53:33,898 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:53:33,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int)) (v_ArrVal_2661 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2661) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:53:33,923 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:53:33,937 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int)) (v_ArrVal_2660 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2660) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:53:33,948 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:53:33,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2659 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2659) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:53:33,972 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:53:33,985 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2658 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2658) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:53:33,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:53:34,009 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2657 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2657) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:53:34,019 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:53:34,032 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2656 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2656) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:53:34,043 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:53:34,056 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2655 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2655) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:53:34,066 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:53:34,079 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2654 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2654) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:53:34,089 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:53:34,098 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2653 (Array Int Int)) (v_ArrVal_2664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2653) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:53:34,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:53:34,116 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int)) (v_ArrVal_2652 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2652) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:53:34,124 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:53:34,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int)) (v_ArrVal_2651 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2651) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:53:34,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:53:34,145 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2664 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2664) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:53:34,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:53:34,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:34,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:53:34,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:53:34,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:53:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 44 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 510 not checked. [2021-11-25 17:53:34,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830937280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:34,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039739293] [2021-11-25 17:53:34,545 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:53:34,546 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:53:34,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:53:34,546 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:53:34,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:53:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:53:34,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:34,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:34,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:34,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:34,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:34,847 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:53:34,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:34,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:34,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:34,995 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:53:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:35,071 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:53:35,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:35,164 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:53:37,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21149#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:53:37,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:53:37,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:53:37,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 50, 50] total 127 [2021-11-25 17:53:37,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569164520] [2021-11-25 17:53:37,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:53:37,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-25 17:53:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:53:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-25 17:53:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=11256, Unknown=29, NotChecked=6960, Total=18632 [2021-11-25 17:53:37,304 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 127 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:42,460 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2021-11-25 17:53:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 17:53:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 127 states have internal predecessors, (255), 0 states have call successors, (0), 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 [2021-11-25 17:53:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:42,461 INFO L225 Difference]: With dead ends: 189 [2021-11-25 17:53:42,461 INFO L226 Difference]: Without dead ends: 113 [2021-11-25 17:53:42,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 251 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 29 IntricatePredicates, 0 DeprecatedPredicates, 4934 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=563, Invalid=18430, Unknown=29, NotChecked=8700, Total=27722 [2021-11-25 17:53:42,463 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 4403 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 7708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 4403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3249 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:42,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 948 Invalid, 7708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 4403 Invalid, 0 Unknown, 3249 Unchecked, 1.7s Time] [2021-11-25 17:53:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-25 17:53:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-11-25 17:53:42,465 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) [2021-11-25 17:53:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-11-25 17:53:42,466 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2021-11-25 17:53:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:42,466 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-11-25 17:53:42,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 127 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-11-25 17:53:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 17:53:42,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:42,468 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-25 17:53:42,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:42,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:42,676 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:53:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash 627943947, now seen corresponding path program 29 times [2021-11-25 17:53:42,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:53:42,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61305547] [2021-11-25 17:53:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:42,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:53:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 169 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:43,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61305547] [2021-11-25 17:53:43,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61305547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:53:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420831295] [2021-11-25 17:53:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:53:43,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:43,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:43,560 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:43,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 17:53:54,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-25 17:53:54,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-25 17:53:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:55,014 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:53:55,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 196 proven. 584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:56,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 225 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:58,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420831295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:58,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770204156] [2021-11-25 17:53:58,895 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:53:58,895 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:53:58,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:53:58,895 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:53:58,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:53:58,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:53:58,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:59,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:59,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:59,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:59,160 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:53:59,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:59,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:53:59,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:59,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:53:59,315 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:53:59,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:59,413 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:53:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:53:59,530 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:54:01,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22313#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:54:01,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:54:01,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:54:01,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 105 [2021-11-25 17:54:01,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663108957] [2021-11-25 17:54:01,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:01,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-25 17:54:01,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-25 17:54:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1508, Invalid=11832, Unknown=0, NotChecked=0, Total=13340 [2021-11-25 17:54:01,296 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 107 states, 106 states have (on average 3.141509433962264) internal successors, (333), 106 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:03,936 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-11-25 17:54:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-25 17:54:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 3.141509433962264) internal successors, (333), 106 states have internal predecessors, (333), 0 states have call successors, (0), 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 [2021-11-25 17:54:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:03,937 INFO L225 Difference]: With dead ends: 119 [2021-11-25 17:54:03,937 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 17:54:03,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6433 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4045, Invalid=18605, Unknown=0, NotChecked=0, Total=22650 [2021-11-25 17:54:03,938 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 944 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:03,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 272 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:54:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 17:54:03,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-11-25 17:54:03,941 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) [2021-11-25 17:54:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-11-25 17:54:03,942 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 111 [2021-11-25 17:54:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:03,942 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-11-25 17:54:03,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 3.141509433962264) internal successors, (333), 106 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-11-25 17:54:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 17:54:03,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:03,943 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2021-11-25 17:54:03,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:04,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-25 17:54:04,143 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:54:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1621840407, now seen corresponding path program 30 times [2021-11-25 17:54:04,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:04,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409957558] [2021-11-25 17:54:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:04,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 47 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:06,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:06,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409957558] [2021-11-25 17:54:06,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409957558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:54:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460917456] [2021-11-25 17:54:06,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:54:06,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:06,779 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:06,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 17:54:09,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:54:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:09,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 265 conjunts are in the unsatisfiable core [2021-11-25 17:54:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:09,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:10,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:10,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:10,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 47 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:11,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:11,872 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:54:11,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:54:11,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2956 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2956) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:54:11,902 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:54:11,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2955 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2955) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:54:11,923 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:54:11,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2954 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2954) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:54:11,944 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:54:11,956 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2953 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2953) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:54:11,965 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:54:11,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2952 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2952) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:54:11,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:54:11,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2951 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2951) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:54:12,007 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:54:12,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2950 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2950) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:54:12,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:54:12,040 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2949 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2949) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:54:12,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:54:12,064 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2948 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2948) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:54:12,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:54:12,083 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2947 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2947) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:54:12,092 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:54:12,103 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2946 (Array Int Int)) (v_ArrVal_2957 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2946) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:54:12,111 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:54:12,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2945 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2945) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:54:12,131 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:54:12,142 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2944 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2944) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:54:12,151 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)))) is different from false [2021-11-25 17:54:12,163 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int)) (v_ArrVal_2943 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2943) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:54:12,172 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:54:12,177 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2957 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2957) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 15 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)))) is different from false [2021-11-25 17:54:12,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:54:12,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:12,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:54:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:54:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:54:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 47 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 584 not checked. [2021-11-25 17:54:12,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460917456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:12,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499284468] [2021-11-25 17:54:12,625 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:54:12,625 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:54:12,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:54:12,625 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:54:12,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:54:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:12,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:54:12,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:12,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:12,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:12,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:12,899 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:54:12,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:13,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:13,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:13,044 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:54:13,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:13,153 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:54:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:13,246 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:54:15,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23454#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:54:15,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:54:15,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:54:15,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 53, 53] total 135 [2021-11-25 17:54:15,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599566140] [2021-11-25 17:54:15,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:15,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-25 17:54:15,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:15,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-25 17:54:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=12566, Unknown=31, NotChecked=7874, Total=20880 [2021-11-25 17:54:15,413 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:20,965 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2021-11-25 17:54:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-25 17:54:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 0 states have call successors, (0), 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 [2021-11-25 17:54:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:20,966 INFO L225 Difference]: With dead ends: 201 [2021-11-25 17:54:20,966 INFO L226 Difference]: Without dead ends: 120 [2021-11-25 17:54:20,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 268 SyntacticMatches, 34 SemanticMatches, 174 ConstructedPredicates, 31 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=592, Invalid=20381, Unknown=31, NotChecked=9796, Total=30800 [2021-11-25 17:54:20,968 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 6448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2224 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:20,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1092 Invalid, 6448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4186 Invalid, 0 Unknown, 2224 Unchecked, 1.6s Time] [2021-11-25 17:54:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-25 17:54:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-11-25 17:54:20,969 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) [2021-11-25 17:54:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-11-25 17:54:20,970 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2021-11-25 17:54:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:20,970 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-11-25 17:54:20,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-11-25 17:54:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-25 17:54:20,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:20,971 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2021-11-25 17:54:20,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:21,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-25 17:54:21,171 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:54:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash 123312491, now seen corresponding path program 31 times [2021-11-25 17:54:21,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:21,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330881245] [2021-11-25 17:54:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:21,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 196 proven. 692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:22,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330881245] [2021-11-25 17:54:22,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330881245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:54:22,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328930736] [2021-11-25 17:54:22,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:54:22,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:22,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:22,160 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:22,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-25 17:54:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-25 17:54:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 225 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:23,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:24,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 225 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:24,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328930736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:24,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576574617] [2021-11-25 17:54:24,557 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:54:24,558 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:54:24,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:54:24,558 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:54:24,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:54:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:24,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:54:24,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:24,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:24,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:24,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:24,851 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:54:24,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:24,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:54:24,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:24,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:54:25,000 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:54:25,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:25,114 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:54:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:54:25,207 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:54:26,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24657#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:54:26,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:54:26,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:54:26,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 77 [2021-11-25 17:54:26,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489126939] [2021-11-25 17:54:26,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:26,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-25 17:54:26,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-25 17:54:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=6915, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 17:54:26,859 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) [2021-11-25 17:54:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:29,321 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2021-11-25 17:54:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 17:54:29,322 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 [2021-11-25 17:54:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:29,323 INFO L225 Difference]: With dead ends: 126 [2021-11-25 17:54:29,323 INFO L226 Difference]: Without dead ends: 126 [2021-11-25 17:54:29,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 301 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3693 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2595, Invalid=12905, Unknown=0, NotChecked=0, Total=15500 [2021-11-25 17:54:29,325 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1024 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:29,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 376 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 17:54:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-25 17:54:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-11-25 17:54:29,328 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) [2021-11-25 17:54:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-11-25 17:54:29,329 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 118 [2021-11-25 17:54:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:29,329 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-11-25 17:54:29,329 INFO L471 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) [2021-11-25 17:54:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-11-25 17:54:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 17:54:29,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:29,330 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2021-11-25 17:54:29,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:29,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:29,545 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:54:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1940782775, now seen corresponding path program 32 times [2021-11-25 17:54:29,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:29,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303449383] [2021-11-25 17:54:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:29,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 50 proven. 920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:54:32,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303449383] [2021-11-25 17:54:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303449383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:54:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94719938] [2021-11-25 17:54:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:54:32,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:32,432 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:32,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 17:55:23,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-25 17:55:23,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:55:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 288 conjunts are in the unsatisfiable core [2021-11-25 17:55:23,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:55:23,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:24,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:24,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:26,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:26,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:26,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 50 proven. 920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:26,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:26,360 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:55:26,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:55:26,376 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3264 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3264) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:55:26,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:55:26,393 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3263 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3263) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)))) is different from false [2021-11-25 17:55:26,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:55:26,413 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3262 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3262) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:55:26,421 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:55:26,431 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3261 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3261) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:55:26,456 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:55:26,467 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int)) (v_ArrVal_3260 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3260) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:55:26,477 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:55:26,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int)) (v_ArrVal_3259 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3259) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:55:26,497 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)))) is different from false [2021-11-25 17:55:26,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int)) (v_ArrVal_3258 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3258) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:55:26,515 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:55:26,527 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int)) (v_ArrVal_3257 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3257) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:55:26,537 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:55:26,549 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int)) (v_ArrVal_3256 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3256) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:55:26,558 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:55:26,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int)) (v_ArrVal_3255 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3255) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:55:26,577 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:55:26,586 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3254 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3254) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:55:26,594 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:55:26,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3253 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3253) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:55:26,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:55:26,622 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3252 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3252) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:55:26,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)))) is different from false [2021-11-25 17:55:26,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3251 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3251) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:55:26,658 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:55:26,668 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3250 (Array Int Int)) (v_ArrVal_3265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3250) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:55:26,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 17:55:26,680 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3265 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_3265) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:55:26,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:55:26,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:26,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:55:26,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:55:26,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:55:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 50 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 663 not checked. [2021-11-25 17:55:27,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94719938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85232601] [2021-11-25 17:55:27,197 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:55:27,197 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:55:27,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:55:27,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:55:27,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:55:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:27,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:55:27,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:27,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:27,511 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:55:27,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:27,645 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:55:27,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,741 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:55:27,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:27,836 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:55:30,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25869#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:55:30,106 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:55:30,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:55:30,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 56, 56] total 146 [2021-11-25 17:55:30,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827813449] [2021-11-25 17:55:30,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:55:30,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-25 17:55:30,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-25 17:55:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=14663, Unknown=33, NotChecked=9042, Total=24180 [2021-11-25 17:55:30,110 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:36,463 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2021-11-25 17:55:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-25 17:55:36,463 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 0 states have call successors, (0), 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 [2021-11-25 17:55:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:36,464 INFO L225 Difference]: With dead ends: 213 [2021-11-25 17:55:36,464 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 17:55:36,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 282 SyntacticMatches, 35 SemanticMatches, 188 ConstructedPredicates, 33 IntricatePredicates, 0 DeprecatedPredicates, 6631 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=643, Invalid=23948, Unknown=33, NotChecked=11286, Total=35910 [2021-11-25 17:55:36,466 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 4342 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 7100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2712 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:36,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1152 Invalid, 7100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4342 Invalid, 0 Unknown, 2712 Unchecked, 1.7s Time] [2021-11-25 17:55:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 17:55:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-11-25 17:55:36,468 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) [2021-11-25 17:55:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-11-25 17:55:36,469 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2021-11-25 17:55:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:36,469 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-11-25 17:55:36,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-11-25 17:55:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 17:55:36,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:36,470 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 17:55:36,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 17:55:36,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-25 17:55:36,670 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:55:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:36,671 INFO L85 PathProgramCache]: Analyzing trace with hash 378835171, now seen corresponding path program 33 times [2021-11-25 17:55:36,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:36,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35894476] [2021-11-25 17:55:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:36,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 225 proven. 778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:37,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35894476] [2021-11-25 17:55:37,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35894476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:55:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843358926] [2021-11-25 17:55:37,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:55:37,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:55:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:55:37,746 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:55:37,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 17:55:39,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:55:39,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:55:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 179 conjunts are in the unsatisfiable core [2021-11-25 17:55:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:55:39,801 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:55:39,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 256 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:41,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 289 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:44,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843358926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:44,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355182351] [2021-11-25 17:55:44,138 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:55:44,138 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:55:44,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:55:44,138 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:55:44,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:55:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:44,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:55:44,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:44,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:44,402 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:55:44,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:44,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:44,546 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:55:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,642 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:55:44,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:44,744 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:55:46,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27176#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:55:46,681 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:55:46,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:55:46,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 113 [2021-11-25 17:55:46,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018081451] [2021-11-25 17:55:46,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:55:46,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-25 17:55:46,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-25 17:55:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1564, Invalid=13688, Unknown=0, NotChecked=0, Total=15252 [2021-11-25 17:55:46,683 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 115 states, 114 states have (on average 3.280701754385965) internal successors, (374), 114 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:49,285 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-11-25 17:55:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-25 17:55:49,286 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 3.280701754385965) internal successors, (374), 114 states have internal predecessors, (374), 0 states have call successors, (0), 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 [2021-11-25 17:55:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:49,286 INFO L225 Difference]: With dead ends: 133 [2021-11-25 17:55:49,286 INFO L226 Difference]: Without dead ends: 133 [2021-11-25 17:55:49,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8005 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4310, Invalid=22096, Unknown=0, NotChecked=0, Total=26406 [2021-11-25 17:55:49,288 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 835 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:49,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 464 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 17:55:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-25 17:55:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-11-25 17:55:49,290 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) [2021-11-25 17:55:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-11-25 17:55:49,291 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 125 [2021-11-25 17:55:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:49,291 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-11-25 17:55:49,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 3.280701754385965) internal successors, (374), 114 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-11-25 17:55:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 17:55:49,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:49,293 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 17:55:49,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-25 17:55:49,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-25 17:55:49,504 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:55:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 578482751, now seen corresponding path program 34 times [2021-11-25 17:55:49,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:49,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709830279] [2021-11-25 17:55:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:49,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 53 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:52,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709830279] [2021-11-25 17:55:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709830279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:55:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719517021] [2021-11-25 17:55:52,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:55:52,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:55:52,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:55:52,655 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:55:52,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-25 17:55:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 295 conjunts are in the unsatisfiable core [2021-11-25 17:55:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:55:53,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:54,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:54,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:54,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:54,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:55,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 53 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:56,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:56,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:55:56,293 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:55:56,302 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3591 (Array Int Int)) (v_ArrVal_3592 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3591) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:55:56,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:55:56,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3590 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3590) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:55:56,326 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:55:56,335 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3589 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3589) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:55:56,342 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:55:56,351 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3588 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3588) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:55:56,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:55:56,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3587 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3587) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)))) is different from false [2021-11-25 17:55:56,374 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:55:56,384 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3586 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3586) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:55:56,391 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:55:56,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3585 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3585) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:55:56,407 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:55:56,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3584 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3584) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:55:56,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:55:56,446 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3583 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3583) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)))) is different from false [2021-11-25 17:55:56,456 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:55:56,469 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3582 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3582) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:55:56,479 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:55:56,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3581 (Array Int Int)) (v_ArrVal_3592 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3581) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:55:56,497 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:55:56,507 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3580 (Array Int Int)) (v_ArrVal_3592 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3580) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:55:56,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:55:56,536 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3579 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3579) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:55:56,543 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:55:56,552 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3578 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3578) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)))) is different from false [2021-11-25 17:55:56,560 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:55:56,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3577 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3577) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:55:56,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 17:55:56,586 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int)) (v_ArrVal_3576 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3576) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)))) is different from false [2021-11-25 17:55:56,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0)) is different from false [2021-11-25 17:55:56,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3592 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_3592) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 17 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:55:56,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:55:56,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:56,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:55:56,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:55:56,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:55:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 53 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 747 not checked. [2021-11-25 17:55:57,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719517021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:57,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448392830] [2021-11-25 17:55:57,081 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:55:57,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:55:57,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:55:57,082 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:55:57,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:55:57,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:55:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:57,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:57,341 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:55:57,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:55:57,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:55:57,497 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:55:57,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,585 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:55:57,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:55:57,663 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:56:00,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28453#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:56:00,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:56:00,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:56:00,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 59, 59] total 151 [2021-11-25 17:56:00,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269590613] [2021-11-25 17:56:00,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:56:00,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-25 17:56:00,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-25 17:56:00,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=15402, Unknown=35, NotChecked=9870, Total=25760 [2021-11-25 17:56:00,019 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 152 states, 152 states have (on average 2.013157894736842) internal successors, (306), 151 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:06,810 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2021-11-25 17:56:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-25 17:56:06,811 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.013157894736842) internal successors, (306), 151 states have internal predecessors, (306), 0 states have call successors, (0), 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 [2021-11-25 17:56:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:06,812 INFO L225 Difference]: With dead ends: 225 [2021-11-25 17:56:06,812 INFO L226 Difference]: Without dead ends: 134 [2021-11-25 17:56:06,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 302 SyntacticMatches, 36 SemanticMatches, 196 ConstructedPredicates, 35 IntricatePredicates, 1 DeprecatedPredicates, 7017 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=679, Invalid=25832, Unknown=35, NotChecked=12460, Total=39006 [2021-11-25 17:56:06,815 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 4138 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 6662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2504 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:06,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1446 Invalid, 6662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4138 Invalid, 0 Unknown, 2504 Unchecked, 1.7s Time] [2021-11-25 17:56:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-25 17:56:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-11-25 17:56:06,818 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) [2021-11-25 17:56:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-11-25 17:56:06,819 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2021-11-25 17:56:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-11-25 17:56:06,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.013157894736842) internal successors, (306), 151 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-11-25 17:56:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 17:56:06,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:06,820 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2021-11-25 17:56:06,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-25 17:56:07,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-25 17:56:07,037 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:56:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash -685779309, now seen corresponding path program 35 times [2021-11-25 17:56:07,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:07,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80854047] [2021-11-25 17:56:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:07,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 256 proven. 869 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:08,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:08,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80854047] [2021-11-25 17:56:08,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80854047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:56:08,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865773618] [2021-11-25 17:56:08,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:56:08,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:56:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:56:08,215 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:56:08,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 17:56:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-25 17:56:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:56:50,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-25 17:56:50,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:56:50,694 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 17:56:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 289 proven. 836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:52,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:56:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 324 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:55,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865773618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:56:55,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077590921] [2021-11-25 17:56:55,771 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:56:55,771 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:56:55,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:56:55,772 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:56:55,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:56:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:56:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:56:55,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:55,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:55,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:55,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:56:56,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:56:56,027 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:56:56,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:56:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:56:56,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:56:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:56:56,192 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:56:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:56,280 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:56:56,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:56:56,355 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:56:58,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29838#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:56:58,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:56:58,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:56:58,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 123 [2021-11-25 17:56:58,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402442331] [2021-11-25 17:56:58,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:56:58,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-25 17:56:58,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-25 17:56:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2063, Invalid=15759, Unknown=0, NotChecked=0, Total=17822 [2021-11-25 17:56:58,263 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) [2021-11-25 17:57:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:01,610 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-11-25 17:57:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-25 17:57:01,610 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 [2021-11-25 17:57:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:01,611 INFO L225 Difference]: With dead ends: 140 [2021-11-25 17:57:01,611 INFO L226 Difference]: Without dead ends: 140 [2021-11-25 17:57:01,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8758 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=5530, Invalid=24920, Unknown=0, NotChecked=0, Total=30450 [2021-11-25 17:57:01,613 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1050 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:01,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 353 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 17:57:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-25 17:57:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-11-25 17:57:01,616 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) [2021-11-25 17:57:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-11-25 17:57:01,617 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 132 [2021-11-25 17:57:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:01,617 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-11-25 17:57:01,617 INFO L471 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) [2021-11-25 17:57:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-11-25 17:57:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 17:57:01,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:01,618 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2021-11-25 17:57:01,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-25 17:57:01,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:01,836 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:57:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash -343426417, now seen corresponding path program 36 times [2021-11-25 17:57:01,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:01,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089425858] [2021-11-25 17:57:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:01,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 56 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:05,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089425858] [2021-11-25 17:57:05,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089425858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044737995] [2021-11-25 17:57:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:57:05,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:05,299 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-25 17:57:10,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:57:10,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:57:10,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 314 conjunts are in the unsatisfiable core [2021-11-25 17:57:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:10,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:11,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:12,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 56 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:13,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:57:13,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:57:13,886 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:57:13,895 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3935 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3935) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:57:13,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:57:13,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3934 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3934) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:57:13,921 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:57:13,931 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3933 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3933) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:57:13,940 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)))) is different from false [2021-11-25 17:57:13,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3932 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3932) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:57:13,958 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:57:13,968 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3931 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3931) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:57:13,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:57:13,986 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3930 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3930) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:57:13,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:57:14,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3929 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3929) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:57:14,010 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:57:14,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3928 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3928) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:57:14,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:57:14,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3927 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3927) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:57:14,044 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:57:14,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3926 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3926) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:57:14,061 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:57:14,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3925 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3925) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:57:14,078 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:57:14,087 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3924 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3924) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)))) is different from false [2021-11-25 17:57:14,095 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:57:14,104 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3923 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3923) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:57:14,113 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:57:14,122 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3922 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3922) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:57:14,144 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)))) is different from false [2021-11-25 17:57:14,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3921 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3921) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:57:14,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 17:57:14,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3920 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3920) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)))) is different from false [2021-11-25 17:57:14,179 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0)) is different from false [2021-11-25 17:57:14,188 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3919 (Array Int Int)) (v_ArrVal_3936 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_3919) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0)) is different from false [2021-11-25 17:57:14,196 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 18)) 0)) is different from false [2021-11-25 17:57:14,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3936 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_3936) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 18 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:57:14,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:57:14,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:14,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:57:14,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:57:14,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:57:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 56 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 836 not checked. [2021-11-25 17:57:14,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044737995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:57:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566801720] [2021-11-25 17:57:14,689 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:57:14,689 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:57:14,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:57:14,689 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:57:14,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:57:14,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:14,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:57:14,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:14,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:14,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:14,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:14,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:14,958 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:57:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:15,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:15,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:15,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:15,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:15,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:15,103 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 17:57:15,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:15,211 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:57:15,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:15,314 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:57:18,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31185#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:57:18,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:57:18,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:57:18,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 62, 62] total 161 [2021-11-25 17:57:18,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405288177] [2021-11-25 17:57:18,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:57:18,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-11-25 17:57:18,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-11-25 17:57:18,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=17450, Unknown=37, NotChecked=11100, Total=29070 [2021-11-25 17:57:18,310 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 162 states, 162 states have (on average 2.0185185185185186) internal successors, (327), 161 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:26,206 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2021-11-25 17:57:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-25 17:57:26,206 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.0185185185185186) internal successors, (327), 161 states have internal predecessors, (327), 0 states have call successors, (0), 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 [2021-11-25 17:57:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:26,207 INFO L225 Difference]: With dead ends: 237 [2021-11-25 17:57:26,207 INFO L226 Difference]: Without dead ends: 141 [2021-11-25 17:57:26,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 317 SyntacticMatches, 38 SemanticMatches, 208 ConstructedPredicates, 37 IntricatePredicates, 1 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=713, Invalid=29154, Unknown=37, NotChecked=13986, Total=43890 [2021-11-25 17:57:26,209 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 6136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 9762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3580 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:26,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1614 Invalid, 9762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6136 Invalid, 0 Unknown, 3580 Unchecked, 2.4s Time] [2021-11-25 17:57:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-25 17:57:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-11-25 17:57:26,211 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) [2021-11-25 17:57:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-11-25 17:57:26,212 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2021-11-25 17:57:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:26,212 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-11-25 17:57:26,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.0185185185185186) internal successors, (327), 161 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:57:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-11-25 17:57:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 17:57:26,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:26,214 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1] [2021-11-25 17:57:26,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-25 17:57:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:26,432 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:57:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash 406654907, now seen corresponding path program 37 times [2021-11-25 17:57:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634124805] [2021-11-25 17:57:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:26,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 289 proven. 965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:27,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:27,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634124805] [2021-11-25 17:57:27,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634124805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:27,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390503023] [2021-11-25 17:57:27,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:57:27,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:27,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:27,527 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:27,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-25 17:57:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:27,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 189 conjunts are in the unsatisfiable core [2021-11-25 17:57:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 324 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:29,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:57:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 324 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:30,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390503023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:57:30,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298638960] [2021-11-25 17:57:30,937 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:57:30,937 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:57:30,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:57:30,938 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:57:30,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:57:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:30,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:57:31,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:31,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:31,215 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:57:31,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:57:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:57:31,352 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:57:31,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,447 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:57:31,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:57:31,527 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:57:33,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32603#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:57:33,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:57:33,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:57:33,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 89 [2021-11-25 17:57:33,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056851186] [2021-11-25 17:57:33,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:57:33,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-25 17:57:33,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:57:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-25 17:57:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=9112, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 17:57:33,477 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) [2021-11-25 17:57:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:38,020 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2021-11-25 17:57:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-25 17:57:38,020 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 [2021-11-25 17:57:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:38,021 INFO L225 Difference]: With dead ends: 147 [2021-11-25 17:57:38,021 INFO L226 Difference]: Without dead ends: 147 [2021-11-25 17:57:38,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4209 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=4589, Invalid=21171, Unknown=0, NotChecked=0, Total=25760 [2021-11-25 17:57:38,023 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 926 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 3468 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 3693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 3468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:38,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 483 Invalid, 3693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 3468 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 17:57:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-25 17:57:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-11-25 17:57:38,027 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) [2021-11-25 17:57:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-11-25 17:57:38,027 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 139 [2021-11-25 17:57:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:38,028 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-11-25 17:57:38,028 INFO L471 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) [2021-11-25 17:57:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-11-25 17:57:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:57:38,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:38,029 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2021-11-25 17:57:38,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-25 17:57:38,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-25 17:57:38,256 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:57:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1560803943, now seen corresponding path program 38 times [2021-11-25 17:57:38,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643071299] [2021-11-25 17:57:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:38,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 59 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:57:42,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:57:42,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643071299] [2021-11-25 17:57:42,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643071299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:57:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628097481] [2021-11-25 17:57:42,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:57:42,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:57:42,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:42,214 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:57:42,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-25 17:59:39,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-25 17:59:39,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:59:39,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 329 conjunts are in the unsatisfiable core [2021-11-25 17:59:40,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:40,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:41,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:42,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:44,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:44,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:44,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 59 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:44,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:44,248 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 17:59:44,255 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:59:44,267 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4294 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4294) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 17:59:44,275 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:59:44,286 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4293 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4293) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 17:59:44,294 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:59:44,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4292 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4292) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 17:59:44,312 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:59:44,322 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4291 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4291) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 17:59:44,344 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:59:44,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4290 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4290) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 17:59:44,369 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:59:44,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4289 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4289) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 17:59:44,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:59:44,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4288 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4288) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:59:44,407 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:59:44,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4287 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4287) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 17:59:44,425 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:59:44,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4286 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4286) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 17:59:44,444 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:59:44,455 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4285 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4285) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 17:59:44,463 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:59:44,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4284 (Array Int Int)) (v_ArrVal_4295 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4284) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 17:59:44,482 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:59:44,492 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4283 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4283) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 17:59:44,501 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:59:44,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4282 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4282) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 17:59:44,519 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:59:44,531 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4281 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4281) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 17:59:44,539 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 17:59:44,550 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4280 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4280) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)))) is different from false [2021-11-25 17:59:44,558 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 17:59:44,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4279 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4279) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 17:59:44,577 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0)) is different from false [2021-11-25 17:59:44,588 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4278 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4278) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0)) is different from false [2021-11-25 17:59:44,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 18)) 0)) is different from false [2021-11-25 17:59:44,608 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int)) (v_ArrVal_4277 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4277) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 18)) 0)) is different from false [2021-11-25 17:59:44,618 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 17:59:44,623 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4295 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_4295) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 19 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 17:59:44,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:59:44,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:44,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 17:59:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 17:59:44,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 17:59:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 59 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 930 not checked. [2021-11-25 17:59:45,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628097481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:45,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598962035] [2021-11-25 17:59:45,201 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 17:59:45,201 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:59:45,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:59:45,202 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:59:45,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:59:45,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:45,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 17:59:45,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:45,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:45,568 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 17:59:45,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:59:45,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:45,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:59:45,709 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 17:59:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,837 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 17:59:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 17:59:45,961 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:59:49,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34053#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 17:59:49,334 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:59:49,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:59:49,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 65, 65] total 168 [2021-11-25 17:59:49,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520951826] [2021-11-25 17:59:49,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:49,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2021-11-25 17:59:49,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-11-25 17:59:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=18799, Unknown=39, NotChecked=12168, Total=31506 [2021-11-25 17:59:49,338 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 169 states, 169 states have (on average 2.0236686390532546) internal successors, (342), 168 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:58,296 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2021-11-25 17:59:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-25 17:59:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0236686390532546) internal successors, (342), 168 states have internal predecessors, (342), 0 states have call successors, (0), 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 144 [2021-11-25 17:59:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:58,297 INFO L225 Difference]: With dead ends: 249 [2021-11-25 17:59:58,297 INFO L226 Difference]: Without dead ends: 148 [2021-11-25 17:59:58,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 335 SyntacticMatches, 40 SemanticMatches, 217 ConstructedPredicates, 39 IntricatePredicates, 1 DeprecatedPredicates, 8642 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=755, Invalid=31582, Unknown=39, NotChecked=15366, Total=47742 [2021-11-25 17:59:58,299 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 5955 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 9941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3930 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:58,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1607 Invalid, 9941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5955 Invalid, 0 Unknown, 3930 Unchecked, 2.5s Time] [2021-11-25 17:59:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-25 17:59:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-25 17:59:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-11-25 17:59:58,302 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2021-11-25 17:59:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:58,303 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-11-25 17:59:58,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0236686390532546) internal successors, (342), 168 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-11-25 17:59:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 17:59:58,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:58,304 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2021-11-25 17:59:58,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:58,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-25 17:59:58,529 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 17:59:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 156023739, now seen corresponding path program 39 times [2021-11-25 17:59:58,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:58,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096173331] [2021-11-25 17:59:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:58,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 324 proven. 1066 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:59,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096173331] [2021-11-25 17:59:59,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096173331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:59:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442752234] [2021-11-25 17:59:59,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:59:59,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:59,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:59,986 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:59,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-25 18:00:08,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:00:08,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 206 conjunts are in the unsatisfiable core [2021-11-25 18:00:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:08,708 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:00:08,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 361 proven. 1029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:11,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 400 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:14,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442752234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431740051] [2021-11-25 18:00:14,538 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:00:14,538 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:14,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:14,538 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:14,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:14,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 18:00:14,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:14,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:14,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:14,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,804 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 18:00:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:14,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:14,953 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 18:00:14,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:15,061 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:00:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:15,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:17,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35580#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 18:00:17,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:17,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:00:17,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 131 [2021-11-25 18:00:17,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349217758] [2021-11-25 18:00:17,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:17,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-25 18:00:17,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-25 18:00:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=17954, Unknown=0, NotChecked=0, Total=20022 [2021-11-25 18:00:17,300 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 133 states, 132 states have (on average 3.3106060606060606) internal successors, (437), 132 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:20,753 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-11-25 18:00:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-25 18:00:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 3.3106060606060606) internal successors, (437), 132 states have internal predecessors, (437), 0 states have call successors, (0), 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 146 [2021-11-25 18:00:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:20,755 INFO L225 Difference]: With dead ends: 154 [2021-11-25 18:00:20,755 INFO L226 Difference]: Without dead ends: 154 [2021-11-25 18:00:20,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10663 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=5711, Invalid=29071, Unknown=0, NotChecked=0, Total=34782 [2021-11-25 18:00:20,759 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 410 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 4168 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 4278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:20,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 599 Invalid, 4278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 18:00:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-25 18:00:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-11-25 18:00:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 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) [2021-11-25 18:00:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-11-25 18:00:20,763 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 146 [2021-11-25 18:00:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:20,763 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-11-25 18:00:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 3.3106060606060606) internal successors, (437), 132 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-11-25 18:00:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 18:00:20,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:20,765 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-25 18:00:20,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:20,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:20,992 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 18:00:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1055116903, now seen corresponding path program 40 times [2021-11-25 18:00:20,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:20,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640118779] [2021-11-25 18:00:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:20,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 62 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:25,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:25,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640118779] [2021-11-25 18:00:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640118779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:00:25,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924074177] [2021-11-25 18:00:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:00:25,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:25,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:25,371 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:25,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-25 18:00:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:25,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 340 conjunts are in the unsatisfiable core [2021-11-25 18:00:25,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:28,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:29,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:30,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:30,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:30,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 62 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:30,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:30,120 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2021-11-25 18:00:30,131 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)))) is different from false [2021-11-25 18:00:30,145 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4672 (Array Int Int)) (v_ArrVal_4673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4672) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2021-11-25 18:00:30,157 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 18:00:30,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4671 (Array Int Int)) (v_ArrVal_4673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4671) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 2)) 0)) is different from false [2021-11-25 18:00:30,220 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 18:00:30,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4670 (Array Int Int)) (v_ArrVal_4673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4670) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 3)) 0)) is different from false [2021-11-25 18:00:30,243 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)))) is different from false [2021-11-25 18:00:30,257 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4669 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4669) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2021-11-25 18:00:30,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 18:00:30,284 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4668 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4668) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 5)) 0)) is different from false [2021-11-25 18:00:30,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 18:00:30,306 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4667 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4667) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 6)) 0)) is different from false [2021-11-25 18:00:30,315 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 18:00:30,326 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4666 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4666) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 18:00:30,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 18:00:30,345 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4665 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4665) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0)) is different from false [2021-11-25 18:00:30,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 18:00:30,363 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4664 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4664) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 9)) 0)) is different from false [2021-11-25 18:00:30,371 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 18:00:30,382 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4663 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4663) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0)) is different from false [2021-11-25 18:00:30,390 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 18:00:30,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4662 (Array Int Int)) (v_ArrVal_4673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4662) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0)) is different from false [2021-11-25 18:00:30,408 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 18:00:30,418 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4661 (Array Int Int)) (v_ArrVal_4673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4661) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) is different from false [2021-11-25 18:00:30,426 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 18:00:30,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4660 (Array Int Int)) (v_ArrVal_4673 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4660) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 13)) 0)) is different from false [2021-11-25 18:00:30,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 18:00:30,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4659 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4659) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 14)) 0)) is different from false [2021-11-25 18:00:30,475 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 18:00:30,490 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4658 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4658) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) is different from false [2021-11-25 18:00:30,502 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 18:00:30,516 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4657 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4657) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 16)) 0)) is different from false [2021-11-25 18:00:30,528 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)) 0)) is different from false [2021-11-25 18:00:30,543 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4656 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4656) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 17)))) is different from false [2021-11-25 18:00:30,554 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 18)) 0)) is different from false [2021-11-25 18:00:30,568 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4655 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4655) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 18)) 0)) is different from false [2021-11-25 18:00:30,578 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 18:00:30,592 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int)) (v_ArrVal_4654 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_4654) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 19 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2021-11-25 18:00:30,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 20)) 0)) is different from false [2021-11-25 18:00:30,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4673 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_4673) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 20 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2021-11-25 18:00:30,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:00:30,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:30,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:00:30,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 [2021-11-25 18:00:30,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:00:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 62 proven. 401 refuted. 0 times theorem prover too weak. 0 trivial. 1029 not checked. [2021-11-25 18:00:31,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924074177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692081439] [2021-11-25 18:00:31,160 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:00:31,161 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:00:31,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:00:31,161 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:00:31,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:00:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 11 [2021-11-25 18:00:31,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:31,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:31,443 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 18:00:31,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:31,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:00:31,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:31,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:00:31,617 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 18:00:31,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,720 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 18:00:31,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:00:31,819 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:00:34,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37061#(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|) (<= 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_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|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrncpy_#in~src#1.offset|) (= |ULTIMATE.start_main_#t~malloc11#1.offset| 0) (<= |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 [2021-11-25 18:00:34,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:00:34,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:00:34,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 68, 68] total 175 [2021-11-25 18:00:34,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063773090] [2021-11-25 18:00:34,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:34,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2021-11-25 18:00:34,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-11-25 18:00:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=20196, Unknown=41, NotChecked=13284, Total=34040 [2021-11-25 18:00:34,459 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 176 states, 176 states have (on average 2.028409090909091) internal successors, (357), 175 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:45,186 INFO L93 Difference]: Finished difference Result 261 states and 262 transitions. [2021-11-25 18:00:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-25 18:00:45,187 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.028409090909091) internal successors, (357), 175 states have internal predecessors, (357), 0 states have call successors, (0), 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 151 [2021-11-25 18:00:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:45,188 INFO L225 Difference]: With dead ends: 261 [2021-11-25 18:00:45,188 INFO L226 Difference]: Without dead ends: 155 [2021-11-25 18:00:45,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 353 SyntacticMatches, 48 SemanticMatches, 225 ConstructedPredicates, 41 IntricatePredicates, 0 DeprecatedPredicates, 9429 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=761, Invalid=33772, Unknown=41, NotChecked=16728, Total=51302 [2021-11-25 18:00:45,190 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 2770 mSDsCounter, 0 mSdLazyCounter, 8537 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 14603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 8537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5978 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:45,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1645 Invalid, 14603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 8537 Invalid, 0 Unknown, 5978 Unchecked, 3.5s Time] [2021-11-25 18:00:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-25 18:00:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-11-25 18:00:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-11-25 18:00:45,193 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2021-11-25 18:00:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:45,193 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-11-25 18:00:45,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.028409090909091) internal successors, (357), 175 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:00:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-11-25 18:00:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-25 18:00:45,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:45,195 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1] [2021-11-25 18:00:45,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-25 18:00:45,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-25 18:00:45,412 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-25 18:00:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:45,413 INFO L85 PathProgramCache]: Analyzing trace with hash -690575725, now seen corresponding path program 41 times [2021-11-25 18:00:45,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:45,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747728094] [2021-11-25 18:00:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:45,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 361 proven. 1172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:46,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747728094] [2021-11-25 18:00:46,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747728094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:00:46,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729738079] [2021-11-25 18:00:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:00:46,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:46,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:46,842 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3973dcd4-30cd-455d-891c-3fcc7f0bdbf1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process