./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.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_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/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_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/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_8e43b720-88d8-4a9c-8eac-19cfa73daab5/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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:02:57,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:02:57,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:02:57,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:02:57,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:02:57,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:02:57,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:02:57,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:02:57,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:02:57,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:02:57,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:02:57,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:02:57,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:02:57,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:02:57,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:02:57,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:02:57,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:02:57,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:02:57,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:02:57,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:02:57,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:02:57,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:02:57,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:02:57,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:02:57,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:02:57,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:02:57,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:02:57,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:02:57,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:02:57,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:02:57,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:02:57,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:02:57,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:02:57,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:02:57,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:02:57,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:02:57,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:02:57,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:02:57,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:02:57,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:02:57,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:02:57,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:02:57,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:02:57,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:02:57,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:02:57,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:02:57,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:02:57,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:02:57,578 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:02:57,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:02:57,579 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:02:57,579 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:02:57,581 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:02:57,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:02:57,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:02:57,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:02:57,582 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:02:57,582 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:02:57,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:02:57,583 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:02:57,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:02:57,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:02:57,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:02:57,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:02:57,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:02:57,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:02:57,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:02:57,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:02:57,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:02:57,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:02:57,590 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:02:57,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:02:57,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:02:57,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:02:57,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:02:57,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:02:57,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:02:57,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:57,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:02:57,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:02:57,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:02:57,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:02:57,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:02:57,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:02:57,594 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_8e43b720-88d8-4a9c-8eac-19cfa73daab5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2021-11-25 20:02:57,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:02:58,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:02:58,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:02:58,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:02:58,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:02:58,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-11-25 20:02:58,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/data/439a170c7/a4a35502fdd84ca39c6fa31e8fbebc67/FLAGd058201ba [2021-11-25 20:02:58,901 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:02:58,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-11-25 20:02:58,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/data/439a170c7/a4a35502fdd84ca39c6fa31e8fbebc67/FLAGd058201ba [2021-11-25 20:02:59,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/data/439a170c7/a4a35502fdd84ca39c6fa31e8fbebc67 [2021-11-25 20:02:59,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:02:59,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:02:59,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:59,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:02:59,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:02:59,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54640712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59, skipping insertion in model container [2021-11-25 20:02:59,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:02:59,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:02:59,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:59,713 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:02:59,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:59,813 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:02:59,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59 WrapperNode [2021-11-25 20:02:59,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:59,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:59,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:02:59,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:02:59,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,879 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-25 20:02:59,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:59,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:02:59,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:02:59,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:02:59,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:02:59,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:02:59,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:02:59,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:02:59,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (1/1) ... [2021-11-25 20:02:59,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:59,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:59,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:02:59,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:03:00,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:03:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:03:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:03:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:03:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:03:00,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:03:00,138 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:03:00,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:03:00,364 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:03:00,428 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:03:00,428 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:03:00,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:03:00 BoogieIcfgContainer [2021-11-25 20:03:00,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:03:00,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:03:00,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:03:00,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:03:00,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:02:59" (1/3) ... [2021-11-25 20:03:00,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7427e2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:03:00, skipping insertion in model container [2021-11-25 20:03:00,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:59" (2/3) ... [2021-11-25 20:03:00,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7427e2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:03:00, skipping insertion in model container [2021-11-25 20:03:00,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:03:00" (3/3) ... [2021-11-25 20:03:00,440 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2021-11-25 20:03:00,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:03:00,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-25 20:03:00,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:03:00,545 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 20:03:00,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-25 20:03:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 2.3) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 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 20:03:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:03:00,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:00,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:03:00,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 105340, now seen corresponding path program 1 times [2021-11-25 20:03:00,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347140000] [2021-11-25 20:03:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:00,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:00,864 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 20:03:00,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:00,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347140000] [2021-11-25 20:03:00,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347140000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:00,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:00,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 20:03:00,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990973618] [2021-11-25 20:03:00,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:00,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:00,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:03:00,926 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 2.3) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 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 20:03:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:01,016 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-25 20:03:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:01,020 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 20:03:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:01,030 INFO L225 Difference]: With dead ends: 21 [2021-11-25 20:03:01,030 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:03:01,033 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 20:03:01,039 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:01,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:03:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 20:03:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 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 20:03:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 20:03:01,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 3 [2021-11-25 20:03:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:01,085 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 20:03:01,085 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 20:03:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 20:03:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:03:01,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:01,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:03:01,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:03:01,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 3267810, now seen corresponding path program 1 times [2021-11-25 20:03:01,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937850570] [2021-11-25 20:03:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:01,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:01,175 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 20:03:01,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937850570] [2021-11-25 20:03:01,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937850570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:01,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:01,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:03:01,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867083059] [2021-11-25 20:03:01,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:01,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:01,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:01,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:01,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:03:01,185 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 20:03:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:01,244 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-25 20:03:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:03:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:01,251 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:03:01,253 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:03:01,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:03:01,257 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:01,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:03:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 20:03:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 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 20:03:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 20:03:01,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2021-11-25 20:03:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:01,276 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 20:03:01,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 20:03:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 20:03:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:03:01,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:01,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:03:01,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:03:01,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash 3267811, now seen corresponding path program 1 times [2021-11-25 20:03:01,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:01,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378076356] [2021-11-25 20:03:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:01,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:01,397 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 20:03:01,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378076356] [2021-11-25 20:03:01,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378076356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:01,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:01,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:03:01,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532798020] [2021-11-25 20:03:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:03:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:03:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:01,402 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 20:03:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:01,461 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 20:03:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:03:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:03:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:01,463 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:03:01,464 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:03:01,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:01,466 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:01,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:03:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-25 20:03:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 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 20:03:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-25 20:03:01,473 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2021-11-25 20:03:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:01,473 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-25 20:03:01,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 20:03:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-25 20:03:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:03:01,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:01,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:03:01,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:03:01,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 3266345, now seen corresponding path program 1 times [2021-11-25 20:03:01,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:01,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892592159] [2021-11-25 20:03:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:01,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:01,587 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 20:03:01,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892592159] [2021-11-25 20:03:01,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892592159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:01,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:01,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:03:01,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76659110] [2021-11-25 20:03:01,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:01,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:03:01,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:03:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:01,592 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 20:03:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:01,687 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-25 20:03:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:03:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:03:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:01,698 INFO L225 Difference]: With dead ends: 19 [2021-11-25 20:03:01,699 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:03:01,699 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 20:03:01,701 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:01,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:03:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 20:03:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 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 20:03:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 20:03:01,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2021-11-25 20:03:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:01,716 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 20:03:01,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 20:03:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 20:03:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:03:01,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:01,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:03:01,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:03:01,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1155966095, now seen corresponding path program 1 times [2021-11-25 20:03:01,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:01,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919790755] [2021-11-25 20:03:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:01,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:01,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:01,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919790755] [2021-11-25 20:03:01,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919790755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:01,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857062263] [2021-11-25 20:03:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:01,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:01,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:01,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:03:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:03:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:02,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:02,428 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 22 treesize of output 18 [2021-11-25 20:03:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:02,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857062263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918898215] [2021-11-25 20:03:02,548 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 20:03:02,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:02,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:02,564 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:02,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:02,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:02,738 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 20:03:02,864 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 20:03:03,026 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 20:03:03,109 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 20:03:03,219 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:03,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|) (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:03,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:03,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:03,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2021-11-25 20:03:03,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617915706] [2021-11-25 20:03:03,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:03,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:03:03,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:03,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:03:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:03:03,819 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:03:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:03,957 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-25 20:03:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:03:03,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:03:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:03,959 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:03:03,959 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:03:03,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:03:03,962 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:03,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 17 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:03:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-25 20:03:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 20:03:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 20:03:03,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2021-11-25 20:03:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:03,967 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 20:03:03,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:03:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 20:03:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:03:03,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:03,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:04,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:04,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:04,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1475209664, now seen corresponding path program 1 times [2021-11-25 20:03:04,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:04,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213677339] [2021-11-25 20:03:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:04,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:04,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:04,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213677339] [2021-11-25 20:03:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213677339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:04,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:04,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:03:04,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189732547] [2021-11-25 20:03:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:03:04,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:03:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:03:04,248 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 20:03:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:04,277 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-25 20:03:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:03:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 20:03:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:04,278 INFO L225 Difference]: With dead ends: 15 [2021-11-25 20:03:04,278 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:03:04,279 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 20:03:04,280 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:04,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:03:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:03:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:03:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 20:03:04,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2021-11-25 20:03:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:04,284 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 20:03:04,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 20:03:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 20:03:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:03:04,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:04,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:04,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:03:04,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1475209663, now seen corresponding path program 1 times [2021-11-25 20:03:04,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:04,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100799608] [2021-11-25 20:03:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:04,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:04,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100799608] [2021-11-25 20:03:04,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100799608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372634231] [2021-11-25 20:03:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:04,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:04,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:04,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:03:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:03:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:04,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:04,588 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 20 treesize of output 16 [2021-11-25 20:03:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:04,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372634231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:04,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395702566] [2021-11-25 20:03:04,631 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:03:04,631 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:04,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:04,632 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:04,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:04,716 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 20:03:04,785 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 20:03:04,885 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 20:03:04,934 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 20:03:05,010 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 20:03:05,044 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:05,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1395702566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:05,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:05,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 4, 4] total 13 [2021-11-25 20:03:05,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442872205] [2021-11-25 20:03:05,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:05,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:03:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:03:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:03:05,556 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 20:03:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:05,628 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-25 20:03:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:03:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 20:03:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:05,629 INFO L225 Difference]: With dead ends: 19 [2021-11-25 20:03:05,630 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:03:05,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:03:05,631 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:05,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:03:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-11-25 20:03:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 20:03:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 20:03:05,634 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2021-11-25 20:03:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:05,635 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 20:03:05,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 20:03:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 20:03:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:03:05,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:05,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:05,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:05,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:05,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1513140689, now seen corresponding path program 1 times [2021-11-25 20:03:05,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:05,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427546637] [2021-11-25 20:03:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:05,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:03:05,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427546637] [2021-11-25 20:03:05,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427546637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:05,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:05,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:03:05,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030339428] [2021-11-25 20:03:05,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:05,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:03:05,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:03:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:03:05,963 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 20:03:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:06,001 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-25 20:03:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:03:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 20:03:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:06,003 INFO L225 Difference]: With dead ends: 15 [2021-11-25 20:03:06,005 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:03:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:03:06,007 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:06,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:03:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:03:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:03:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 20:03:06,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-25 20:03:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:06,015 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 20:03:06,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 20:03:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 20:03:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:03:06,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:06,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:06,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:03:06,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1513140690, now seen corresponding path program 1 times [2021-11-25 20:03:06,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:06,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143026311] [2021-11-25 20:03:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:06,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:06,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:06,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143026311] [2021-11-25 20:03:06,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143026311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945890653] [2021-11-25 20:03:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:06,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:06,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:06,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:03:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:03:06,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:06,293 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:06,294 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 20:03:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:06,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:06,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945890653] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:06,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:03:06,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2021-11-25 20:03:06,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922015457] [2021-11-25 20:03:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:06,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:03:06,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:06,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:03:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:03:06,638 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 20:03:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:06,696 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-25 20:03:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:03:06,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 20:03:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:06,697 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:03:06,697 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:03:06,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:03:06,698 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:06,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 5 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:03:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-25 20:03:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 20:03:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 20:03:06,703 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-11-25 20:03:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:06,703 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 20:03:06,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 20:03:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 20:03:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:03:06,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:06,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:06,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 20:03:06,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:03:06,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1865709960, now seen corresponding path program 1 times [2021-11-25 20:03:06,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:06,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398194511] [2021-11-25 20:03:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:06,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:07,095 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 20:03:07,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398194511] [2021-11-25 20:03:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398194511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310603169] [2021-11-25 20:03:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:07,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:07,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:07,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:07,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:03:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:07,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:03:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:07,276 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 20:03:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:07,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:07,357 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 20:03:07,365 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 20:03:07,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:07,406 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 13 treesize of output 11 [2021-11-25 20:03:07,414 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 20 treesize of output 18 [2021-11-25 20:03:07,583 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 20:03:07,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310603169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825271854] [2021-11-25 20:03:07,589 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:07,589 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:07,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:07,590 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:07,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:07,673 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 20:03:07,732 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 11 treesize of output 7 [2021-11-25 20:03:07,803 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 20:03:07,844 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 20:03:07,938 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 20:03:08,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:08,066 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:08,066 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 20:03:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:08,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:08,227 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:08,228 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 20:03:08,322 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:08,323 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 20:03:08,446 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:10,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '592#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:10,037 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:10,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:10,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-11-25 20:03:10,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992952812] [2021-11-25 20:03:10,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:10,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 20:03:10,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 20:03:10,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:03:10,040 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:10,256 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-25 20:03:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:03:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:03:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:10,259 INFO L225 Difference]: With dead ends: 23 [2021-11-25 20:03:10,259 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 20:03:10,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:03:10,261 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:10,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-11-25 20:03:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 20:03:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-25 20:03:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 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 20:03:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-25 20:03:10,265 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-11-25 20:03:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-25 20:03:10,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-25 20:03:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:03:10,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:10,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:10,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:10,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:03:10,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2002450371, now seen corresponding path program 1 times [2021-11-25 20:03:10,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:10,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116376504] [2021-11-25 20:03:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:10,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:03:10,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:10,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116376504] [2021-11-25 20:03:10,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116376504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:10,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:10,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:03:10,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494381508] [2021-11-25 20:03:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:03:10,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:03:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:03:10,613 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 2.2) 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 20:03:10,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:10,650 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-25 20:03:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:03:10,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) 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 20:03:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:10,652 INFO L225 Difference]: With dead ends: 21 [2021-11-25 20:03:10,652 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:03:10,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:03:10,654 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:10,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:03:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:03:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:03:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 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 20:03:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 20:03:10,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-25 20:03:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:10,661 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 20:03:10,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) 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 20:03:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 20:03:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:03:10,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:10,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:10,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:03:10,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash -346987898, now seen corresponding path program 2 times [2021-11-25 20:03:10,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:10,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086881847] [2021-11-25 20:03:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:10,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:10,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086881847] [2021-11-25 20:03:10,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086881847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091490377] [2021-11-25 20:03:10,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:03:10,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:10,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:10,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:10,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:03:10,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:03:10,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 20:03:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:10,894 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 13 treesize of output 9 [2021-11-25 20:03:10,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:10,935 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 17 [2021-11-25 20:03:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:03:11,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:11,149 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 13 treesize of output 11 [2021-11-25 20:03:11,154 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 15 treesize of output 11 [2021-11-25 20:03:11,165 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 20 treesize of output 18 [2021-11-25 20:03:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:03:11,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091490377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:11,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870038695] [2021-11-25 20:03:11,204 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:11,204 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:11,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:11,206 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:11,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:11,268 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 20:03:11,323 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 20:03:11,377 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 20:03:11,413 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 20:03:11,481 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 20:03:11,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:11,593 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:11,593 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 20:03:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:11,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:11,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:11,759 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:03:11,759 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 54 treesize of output 56 [2021-11-25 20:03:11,874 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:11,874 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 20:03:11,981 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:13,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '778#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:13,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:13,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:13,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2021-11-25 20:03:13,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879090849] [2021-11-25 20:03:13,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:13,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:03:13,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:03:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:03:13,507 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 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 20:03:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:13,655 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 20:03:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:03:13,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 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 12 [2021-11-25 20:03:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:13,656 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:03:13,657 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:03:13,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:03:13,660 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:13,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 3 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-25 20:03:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:03:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-25 20:03:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 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 20:03:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 20:03:13,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-11-25 20:03:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:13,671 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 20:03:13,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 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 20:03:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 20:03:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:03:13,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:13,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:03:13,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:13,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:13,895 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2128277037, now seen corresponding path program 1 times [2021-11-25 20:03:13,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465504341] [2021-11-25 20:03:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:13,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:14,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465504341] [2021-11-25 20:03:14,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465504341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310288120] [2021-11-25 20:03:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:14,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:14,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:14,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:03:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:03:14,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:14,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:14,149 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 20:03:14,154 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 20:03:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:14,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:14,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310288120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:14,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261460125] [2021-11-25 20:03:14,493 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:14,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:14,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:14,494 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:14,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:14,538 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 20:03:14,574 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 20:03:14,621 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 20:03:14,649 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 20:03:14,707 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 20:03:14,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:14,805 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:14,806 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 20:03:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:14,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:14,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:14,976 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:14,977 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 20:03:15,086 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:03:15,193 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:16,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:16,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:16,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:16,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-11-25 20:03:16,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893635534] [2021-11-25 20:03:16,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:16,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 20:03:16,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 20:03:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:03:16,397 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 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 20:03:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:16,611 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-25 20:03:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:03:16,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 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) Word has length 13 [2021-11-25 20:03:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:16,612 INFO L225 Difference]: With dead ends: 19 [2021-11-25 20:03:16,612 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:03:16,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-11-25 20:03:16,614 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 55 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:16,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:03:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-25 20:03:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 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 20:03:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-25 20:03:16,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-11-25 20:03:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:16,617 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-25 20:03:16,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 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 20:03:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-25 20:03:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:03:16,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:16,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:03:16,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:16,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:16,831 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash 869799955, now seen corresponding path program 3 times [2021-11-25 20:03:16,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136816980] [2021-11-25 20:03:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:16,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:17,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:17,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136816980] [2021-11-25 20:03:17,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136816980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:17,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242067388] [2021-11-25 20:03:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:03:17,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:17,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:17,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:17,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:03:17,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:03:17,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-25 20:03:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:17,229 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 20:03:17,234 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 20:03:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:03:17,387 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 11 treesize of output 7 [2021-11-25 20:03:17,413 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 20:03:17,436 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 20:03:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:17,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:17,499 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_215) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-25 20:03:17,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:17,538 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 20:03:17,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:17,544 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 20:03:17,548 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 20:03:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 20:03:17,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242067388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:17,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155790245] [2021-11-25 20:03:17,838 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:17,839 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:17,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:17,839 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:17,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:17,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:17,882 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 20:03:17,923 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 20:03:17,972 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 20:03:17,999 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 20:03:18,053 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 20:03:18,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:18,158 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:18,159 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 20:03:18,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:18,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:18,280 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:18,281 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 20:03:18,397 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:18,397 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 20:03:18,488 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:20,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1078#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:20,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:20,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:20,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 22 [2021-11-25 20:03:20,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253656615] [2021-11-25 20:03:20,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:20,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 20:03:20,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 20:03:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=724, Unknown=1, NotChecked=54, Total=870 [2021-11-25 20:03:20,017 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 20:03:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:20,423 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-25 20:03:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:03:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) Word has length 15 [2021-11-25 20:03:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:20,425 INFO L225 Difference]: With dead ends: 28 [2021-11-25 20:03:20,425 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:03:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=185, Invalid=1224, Unknown=1, NotChecked=72, Total=1482 [2021-11-25 20:03:20,427 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:20,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 196 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-25 20:03:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:03:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-25 20:03:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 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 20:03:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-25 20:03:20,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2021-11-25 20:03:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:20,430 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-25 20:03:20,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 20:03:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-25 20:03:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:03:20,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:20,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:03:20,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 20:03:20,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:03:20,645 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash 645895365, now seen corresponding path program 4 times [2021-11-25 20:03:20,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:20,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856494577] [2021-11-25 20:03:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:20,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:20,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856494577] [2021-11-25 20:03:20,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856494577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148842364] [2021-11-25 20:03:20,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:03:20,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:20,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:20,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:20,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:03:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 20:03:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:20,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:21,088 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 20:03:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148842364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176991988] [2021-11-25 20:03:21,103 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:21,103 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:21,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:21,104 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:21,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:21,153 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 20:03:21,200 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 20:03:21,247 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 20:03:21,275 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 20:03:21,320 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 20:03:21,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:21,399 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:21,399 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 20:03:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:21,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:21,520 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:21,521 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 20:03:21,611 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:21,611 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 20:03:21,688 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:22,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1269#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:22,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:22,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:22,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-25 20:03:22,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377052432] [2021-11-25 20:03:22,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:22,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 20:03:22,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 20:03:22,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:03:22,946 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 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 20:03:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:23,204 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-25 20:03:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:03:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 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) Word has length 17 [2021-11-25 20:03:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:23,206 INFO L225 Difference]: With dead ends: 25 [2021-11-25 20:03:23,206 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 20:03:23,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 20:03:23,207 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:23,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 20:03:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-25 20:03:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 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 20:03:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-25 20:03:23,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-11-25 20:03:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:23,210 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-25 20:03:23,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 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 20:03:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-25 20:03:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:03:23,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:23,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:03:23,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:23,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:23,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1452080178, now seen corresponding path program 2 times [2021-11-25 20:03:23,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441675133] [2021-11-25 20:03:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:23,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:23,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441675133] [2021-11-25 20:03:23,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441675133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18233216] [2021-11-25 20:03:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:03:23,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:23,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:23,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:23,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:03:23,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:03:23,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-25 20:03:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:23,681 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:23,681 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 20:03:23,695 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 20:03:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:03:23,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:03:24,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18233216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50878852] [2021-11-25 20:03:24,261 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:24,262 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:24,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:24,262 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:24,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:24,302 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 20:03:24,338 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 20:03:24,383 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 20:03:24,408 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 20:03:24,453 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 20:03:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:24,531 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:24,532 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 20:03:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:24,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:24,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:24,654 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:24,655 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 20:03:24,730 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:24,730 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 20:03:24,811 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:26,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1461#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:26,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:26,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:26,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-11-25 20:03:26,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165199326] [2021-11-25 20:03:26,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:26,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 20:03:26,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 20:03:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:03:26,217 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:26,703 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-25 20:03:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:03:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 20:03:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:26,704 INFO L225 Difference]: With dead ends: 30 [2021-11-25 20:03:26,705 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 20:03:26,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 20:03:26,706 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:26,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-25 20:03:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 20:03:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-25 20:03:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:03:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-25 20:03:26,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2021-11-25 20:03:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:26,710 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-25 20:03:26,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-25 20:03:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:03:26,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:26,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 20:03:26,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:26,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:26,933 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 415320436, now seen corresponding path program 5 times [2021-11-25 20:03:26,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71418726] [2021-11-25 20:03:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:26,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:27,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71418726] [2021-11-25 20:03:27,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71418726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:27,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469555381] [2021-11-25 20:03:27,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:03:27,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:27,194 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:27,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:03:27,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:03:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 20:03:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:27,321 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:03:27,333 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 20:03:27,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:03:27,510 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 11 treesize of output 7 [2021-11-25 20:03:27,526 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 14 treesize of output 16 [2021-11-25 20:03:27,573 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 20:03:27,611 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 20:03:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:27,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:27,645 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_331 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_331) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-25 20:03:27,663 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_331 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_331) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-11-25 20:03:27,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:27,678 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 20:03:27,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:27,684 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 20:03:27,687 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 20:03:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-25 20:03:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469555381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170170488] [2021-11-25 20:03:27,916 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:27,916 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:27,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:27,917 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:27,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:27,953 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 20:03:27,994 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 20:03:28,033 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 20:03:28,058 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 20:03:28,122 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 14 treesize of output 10 [2021-11-25 20:03:28,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:28,211 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:28,212 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 20:03:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:28,329 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:28,330 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 20:03:28,403 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:28,404 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 20:03:28,510 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:29,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1695#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:29,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:29,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:29,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2021-11-25 20:03:29,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812801302] [2021-11-25 20:03:29,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:29,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 20:03:29,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 20:03:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=954, Unknown=2, NotChecked=126, Total=1190 [2021-11-25 20:03:29,805 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 20:03:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:30,095 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-11-25 20:03:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:03:30,095 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) Word has length 20 [2021-11-25 20:03:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:30,095 INFO L225 Difference]: With dead ends: 42 [2021-11-25 20:03:30,096 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 20:03:30,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=1257, Unknown=2, NotChecked=146, Total=1560 [2021-11-25 20:03:30,097 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:30,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 258 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2021-11-25 20:03:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 20:03:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-25 20:03:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 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 20:03:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-25 20:03:30,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2021-11-25 20:03:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:30,101 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-25 20:03:30,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 20:03:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-25 20:03:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:03:30,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:30,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 20:03:30,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:30,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:03:30,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2133191682, now seen corresponding path program 6 times [2021-11-25 20:03:30,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:30,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496423370] [2021-11-25 20:03:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:30,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:30,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496423370] [2021-11-25 20:03:30,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496423370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408070725] [2021-11-25 20:03:30,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:03:30,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:30,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:30,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:03:30,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:03:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:03:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:30,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:30,852 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 20:03:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:30,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408070725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734315206] [2021-11-25 20:03:30,872 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:30,872 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:30,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:30,872 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:30,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:30,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:30,916 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 20:03:30,948 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 20:03:30,991 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 20:03:31,024 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 20:03:31,068 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 20:03:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:31,145 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:31,145 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 20:03:31,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:31,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:31,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:31,269 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:31,269 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 20:03:31,362 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:31,362 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 20:03:31,436 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:32,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1939#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:32,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:32,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:32,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2021-11-25 20:03:32,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612141317] [2021-11-25 20:03:32,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:03:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:03:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:03:32,669 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:32,964 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-25 20:03:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:03:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 20:03:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:32,965 INFO L225 Difference]: With dead ends: 31 [2021-11-25 20:03:32,965 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:03:32,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=1379, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 20:03:32,967 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:32,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:03:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:03:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 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 20:03:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-25 20:03:32,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2021-11-25 20:03:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:32,971 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-25 20:03:32,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-25 20:03:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:03:32,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:32,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 20:03:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:33,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:03:33,190 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1577274647, now seen corresponding path program 7 times [2021-11-25 20:03:33,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:33,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540399628] [2021-11-25 20:03:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:33,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:33,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540399628] [2021-11-25 20:03:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540399628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151916825] [2021-11-25 20:03:33,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:03:33,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:33,507 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:33,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:03:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-25 20:03:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:33,621 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 20:03:33,804 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 20:03:33,860 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 20:03:33,902 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 20:03:33,922 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 20:03:33,943 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 20:03:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:33,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:33,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-25 20:03:33,968 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:03:33,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:03:33,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:33,989 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 20:03:33,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:33,994 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 20:03:33,996 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 20:03:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2021-11-25 20:03:34,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151916825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145319110] [2021-11-25 20:03:34,155 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:34,155 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:34,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:34,155 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:34,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:34,201 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 20:03:34,232 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 20:03:34,278 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 20:03:34,312 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 20:03:34,357 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 20:03:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:34,435 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:34,436 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 20:03:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:34,547 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:03:34,548 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 54 treesize of output 56 [2021-11-25 20:03:34,619 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:34,619 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 20:03:34,706 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:35,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:35,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:35,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:35,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2021-11-25 20:03:35,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529438438] [2021-11-25 20:03:35,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 20:03:35,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 20:03:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=961, Unknown=3, NotChecked=192, Total=1260 [2021-11-25 20:03:35,996 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20:03:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:36,383 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-25 20:03:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:03:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) Word has length 25 [2021-11-25 20:03:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:36,384 INFO L225 Difference]: With dead ends: 47 [2021-11-25 20:03:36,384 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:03:36,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=167, Invalid=1482, Unknown=3, NotChecked=240, Total=1892 [2021-11-25 20:03:36,385 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:36,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 335 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2021-11-25 20:03:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:03:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-25 20:03:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 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 20:03:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-25 20:03:36,389 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-11-25 20:03:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-25 20:03:36,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20:03:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-25 20:03:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:03:36,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:36,390 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-25 20:03:36,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:36,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:36,599 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1182526647, now seen corresponding path program 8 times [2021-11-25 20:03:36,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:36,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620222835] [2021-11-25 20:03:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:36,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:36,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620222835] [2021-11-25 20:03:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620222835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163874432] [2021-11-25 20:03:36,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:03:36,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:36,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:36,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:03:36,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:03:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-25 20:03:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:36,922 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 20:03:36,929 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 20:03:37,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:03:37,141 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 20:03:37,218 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 20:03:37,297 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 17 treesize of output 19 [2021-11-25 20:03:37,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:37,404 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 18 [2021-11-25 20:03:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:03:37,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:37,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:37,932 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 20:03:37,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:37,939 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 20:03:37,942 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 20:03:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:03:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163874432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:38,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384360240] [2021-11-25 20:03:38,295 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:38,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:38,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:38,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:38,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:38,324 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 20:03:38,356 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 20:03:38,393 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 20:03:38,428 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 20:03:38,471 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 20:03:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:38,544 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:38,544 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 20:03:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:38,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:38,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:38,645 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 20:03:38,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 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 20:03:38,693 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:38,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:03:38,780 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:40,117 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2497#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:40,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:40,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:40,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 33 [2021-11-25 20:03:40,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565476063] [2021-11-25 20:03:40,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:40,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 20:03:40,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:40,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 20:03:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1549, Unknown=1, NotChecked=0, Total=1722 [2021-11-25 20:03:40,120 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 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 20:03:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:41,133 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-11-25 20:03:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:03:41,134 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 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 20:03:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:41,134 INFO L225 Difference]: With dead ends: 39 [2021-11-25 20:03:41,134 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 20:03:41,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=425, Invalid=3229, Unknown=6, NotChecked=0, Total=3660 [2021-11-25 20:03:41,136 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:41,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-11-25 20:03:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 20:03:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-11-25 20:03:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1111111111111112) 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 20:03:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-25 20:03:41,140 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2021-11-25 20:03:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:41,141 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-25 20:03:41,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 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 20:03:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-25 20:03:41,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:03:41,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:41,142 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 20:03:41,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:41,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:41,350 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1732346243, now seen corresponding path program 3 times [2021-11-25 20:03:41,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:41,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102907171] [2021-11-25 20:03:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:41,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:41,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:41,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102907171] [2021-11-25 20:03:41,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102907171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:41,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605405618] [2021-11-25 20:03:41,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:03:41,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:41,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:41,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:41,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:03:41,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:03:41,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:41,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 20:03:41,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:41,658 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:41,659 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 20:03:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:42,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:42,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605405618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:42,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167602172] [2021-11-25 20:03:42,251 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:42,252 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:42,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:42,252 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:42,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:42,281 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 20:03:42,310 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 20:03:42,349 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 20:03:42,371 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 20:03:42,405 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 20:03:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:42,468 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:42,468 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 20:03:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:42,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:42,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:42,570 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:03:42,571 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 54 treesize of output 56 [2021-11-25 20:03:42,662 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:42,662 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 20:03:42,733 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:44,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2840#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:44,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:44,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:44,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 36 [2021-11-25 20:03:44,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178529521] [2021-11-25 20:03:44,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:44,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 20:03:44,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 20:03:44,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 20:03:44,035 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 20:03:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:44,493 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-11-25 20:03:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:03:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 31 [2021-11-25 20:03:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:44,494 INFO L225 Difference]: With dead ends: 58 [2021-11-25 20:03:44,494 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 20:03:44,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=489, Invalid=2591, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 20:03:44,496 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:44,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 20:03:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-25 20:03:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-25 20:03:44,504 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2021-11-25 20:03:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:44,504 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-25 20:03:44,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 20:03:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-25 20:03:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 20:03:44,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:44,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-11-25 20:03:44,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:44,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 20:03:44,708 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1987225035, now seen corresponding path program 4 times [2021-11-25 20:03:44,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:44,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681251134] [2021-11-25 20:03:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:44,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:44,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681251134] [2021-11-25 20:03:44,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681251134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056539808] [2021-11-25 20:03:44,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:03:44,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:44,958 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:44,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:03:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 20:03:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:45,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:45,099 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 20:03:45,102 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 20:03:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:45,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:46,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056539808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:46,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581050018] [2021-11-25 20:03:46,110 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:46,110 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:46,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:46,110 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:46,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:46,148 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 20:03:46,179 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 20:03:46,213 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 20:03:46,233 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 20:03:46,273 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 20:03:46,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:46,331 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:46,332 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 20:03:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:46,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:46,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:46,445 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:46,445 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 20:03:46,494 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:46,495 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 20:03:46,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:47,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3204#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:47,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:47,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:47,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2021-11-25 20:03:47,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875451618] [2021-11-25 20:03:47,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:47,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 20:03:47,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:47,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 20:03:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 20:03:47,933 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 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 20:03:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:48,581 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-25 20:03:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:03:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 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) Word has length 33 [2021-11-25 20:03:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:48,584 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:03:48,584 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 20:03:48,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 20:03:48,585 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 170 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:48,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:03:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 20:03:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 20:03:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0789473684210527) 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 20:03:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-25 20:03:48,589 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2021-11-25 20:03:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:48,589 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-25 20:03:48,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 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 20:03:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-25 20:03:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 20:03:48,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:48,591 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2021-11-25 20:03:48,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:48,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:48,798 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 408199480, now seen corresponding path program 5 times [2021-11-25 20:03:48,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770858199] [2021-11-25 20:03:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:48,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:49,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:49,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770858199] [2021-11-25 20:03:49,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770858199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191463624] [2021-11-25 20:03:49,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:03:49,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:49,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:49,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:03:49,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 20:03:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 20:03:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:49,236 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:49,236 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 20:03:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 57 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:49,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 57 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:49,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191463624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:49,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444948574] [2021-11-25 20:03:49,969 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:49,969 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:49,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:49,969 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:49,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:50,004 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 20:03:50,029 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 20:03:50,062 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 20:03:50,086 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 20:03:50,127 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 20:03:50,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:50,203 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:50,203 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 20:03:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:50,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:50,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:50,278 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:50,279 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 20:03:50,350 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:50,351 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 20:03:50,401 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:51,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3569#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:51,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:51,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:51,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2021-11-25 20:03:51,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622916147] [2021-11-25 20:03:51,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:51,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 20:03:51,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 20:03:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 20:03:51,729 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 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 20:03:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:52,028 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-11-25 20:03:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 20:03:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 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 36 [2021-11-25 20:03:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:52,030 INFO L225 Difference]: With dead ends: 63 [2021-11-25 20:03:52,030 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 20:03:52,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:03:52,032 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:52,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 20:03:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-25 20:03:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-25 20:03:52,036 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-11-25 20:03:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:52,037 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-25 20:03:52,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 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 20:03:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-25 20:03:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 20:03:52,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:52,039 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-11-25 20:03:52,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:52,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 20:03:52,259 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1936615366, now seen corresponding path program 6 times [2021-11-25 20:03:52,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:52,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556985224] [2021-11-25 20:03:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:52,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 25 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:52,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:52,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556985224] [2021-11-25 20:03:52,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556985224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:52,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520907518] [2021-11-25 20:03:52,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:03:52,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:52,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:52,551 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:52,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 20:03:52,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:03:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:52,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 20:03:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:52,704 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:52,705 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 20:03:52,717 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 20:03:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:53,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:54,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520907518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561282731] [2021-11-25 20:03:54,520 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:54,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:54,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:54,521 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:54,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:54,554 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 20:03:54,590 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 20:03:54,635 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 20:03:54,667 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 20:03:54,714 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 20:03:54,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:54,777 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:54,777 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 20:03:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:54,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:54,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:54,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:54,871 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:03:54,871 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 20:03:54,933 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:03:54,933 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 20:03:54,987 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:56,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3969#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:56,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:56,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:56,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2021-11-25 20:03:56,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208991955] [2021-11-25 20:03:56,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:56,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 20:03:56,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 20:03:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:03:56,591 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 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 20:03:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:57,122 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-25 20:03:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:03:57,123 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 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 38 [2021-11-25 20:03:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:57,123 INFO L225 Difference]: With dead ends: 43 [2021-11-25 20:03:57,123 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 20:03:57,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=481, Invalid=3941, Unknown=0, NotChecked=0, Total=4422 [2021-11-25 20:03:57,126 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:57,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 3 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-11-25 20:03:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 20:03:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 20:03:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:03:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-25 20:03:57,130 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2021-11-25 20:03:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:57,130 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-25 20:03:57,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 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 20:03:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-25 20:03:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 20:03:57,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:57,132 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 20:03:57,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:57,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 20:03:57,351 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:03:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:57,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1366527852, now seen corresponding path program 9 times [2021-11-25 20:03:57,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:57,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693660249] [2021-11-25 20:03:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:57,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 7 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:57,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693660249] [2021-11-25 20:03:57,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693660249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844121075] [2021-11-25 20:03:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:03:57,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:57,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:57,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 20:03:57,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:03:57,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:03:57,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-25 20:03:57,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:57,967 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:03:57,967 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 20:03:57,977 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 20:03:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:03:58,355 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 11 treesize of output 7 [2021-11-25 20:03:58,370 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 14 treesize of output 16 [2021-11-25 20:03:58,420 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 20:03:58,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:03:58,522 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 20:03:58,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:03:58,619 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 20:03:58,693 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 20:03:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 7 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:58,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:58,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_818) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-25 20:03:58,761 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_818) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:03:58,775 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_818) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:03:58,792 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_818) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-11-25 20:03:58,806 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_818) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:03:58,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_818) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:03:58,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:58,878 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 20:03:58,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:03:58,884 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 20:03:58,887 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 20:03:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 61 not checked. [2021-11-25 20:03:59,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844121075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003728095] [2021-11-25 20:03:59,609 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:03:59,609 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:59,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:59,610 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:59,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:59,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:59,651 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 20:03:59,688 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 20:03:59,736 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 14 treesize of output 10 [2021-11-25 20:03:59,766 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 20:03:59,825 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 20:03:59,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:59,914 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:03:59,915 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 20:03:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:59,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:03:59,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:03:59,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:00,028 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:04:00,029 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 20:04:00,095 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:00,095 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 20:04:00,155 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:01,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4371#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:01,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:01,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:01,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 52 [2021-11-25 20:04:01,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432105111] [2021-11-25 20:04:01,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:01,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-25 20:04:01,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-25 20:04:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2701, Unknown=6, NotChecked=654, Total=3540 [2021-11-25 20:04:01,673 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 20:04:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:02,702 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-25 20:04:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:04:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 40 [2021-11-25 20:04:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:02,704 INFO L225 Difference]: With dead ends: 68 [2021-11-25 20:04:02,704 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 20:04:02,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=286, Invalid=3892, Unknown=6, NotChecked=786, Total=4970 [2021-11-25 20:04:02,707 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:02,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 43 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1006 Invalid, 0 Unknown, 299 Unchecked, 0.5s Time] [2021-11-25 20:04:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 20:04:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-25 20:04:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.069767441860465) 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 20:04:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-25 20:04:02,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-11-25 20:04:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:02,711 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-25 20:04:02,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 20:04:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-25 20:04:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 20:04:02,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:02,713 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 20:04:02,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:02,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 20:04:02,934 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1712021242, now seen corresponding path program 10 times [2021-11-25 20:04:02,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:02,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430729610] [2021-11-25 20:04:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:02,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:03,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:03,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430729610] [2021-11-25 20:04:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430729610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:03,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877701089] [2021-11-25 20:04:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:04:03,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:03,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 20:04:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:03,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 20:04:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:03,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:04,053 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 20:04:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:04,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877701089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:04,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989162638] [2021-11-25 20:04:04,086 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:04,086 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:04,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:04,087 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:04,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:04,128 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 20:04:04,169 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 20:04:04,198 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 20:04:04,223 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 20:04:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 20:04:04,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:04,330 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:04,330 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 20:04:04,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:04,440 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 20:04:04,440 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 20:04:04,500 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:04,500 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 20:04:04,559 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:05,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4807#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:05,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:05,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:05,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2021-11-25 20:04:05,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126526635] [2021-11-25 20:04:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:05,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 20:04:05,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 20:04:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:04:05,951 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 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 20:04:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:06,695 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-25 20:04:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:04:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-25 20:04:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:06,696 INFO L225 Difference]: With dead ends: 50 [2021-11-25 20:04:06,696 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 20:04:06,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=655, Invalid=3505, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 20:04:06,697 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 158 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:06,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:04:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 20:04:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-11-25 20:04:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.0666666666666667) 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 20:04:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-25 20:04:06,701 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-11-25 20:04:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:06,702 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-25 20:04:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 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 20:04:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-25 20:04:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 20:04:06,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:06,703 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 20:04:06,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-25 20:04:06,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 20:04:06,910 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1533050937, now seen corresponding path program 7 times [2021-11-25 20:04:06,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400540479] [2021-11-25 20:04:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:06,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:07,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400540479] [2021-11-25 20:04:07,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400540479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134049959] [2021-11-25 20:04:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:04:07,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:07,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:07,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:07,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 20:04:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 20:04:07,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:07,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:07,369 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 20:04:07,386 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 20:04:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 49 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:07,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 64 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:08,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134049959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246820142] [2021-11-25 20:04:08,736 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:08,736 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:08,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:08,737 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:08,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:08,776 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 20:04:08,811 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 20:04:08,847 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 20:04:08,866 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 20:04:08,922 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 20:04:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:08,993 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:08,993 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 20:04:09,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:09,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:09,081 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:04:09,082 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 54 treesize of output 56 [2021-11-25 20:04:09,145 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:09,146 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 20:04:09,206 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:10,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5252#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:10,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:10,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:10,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 53 [2021-11-25 20:04:10,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832597296] [2021-11-25 20:04:10,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:10,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-25 20:04:10,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-25 20:04:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3389, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 20:04:10,704 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 54 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 20:04:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:11,601 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-25 20:04:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:04:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 54 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) Word has length 43 [2021-11-25 20:04:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:11,602 INFO L225 Difference]: With dead ends: 49 [2021-11-25 20:04:11,602 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 20:04:11,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=947, Invalid=5215, Unknown=0, NotChecked=0, Total=6162 [2021-11-25 20:04:11,603 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 231 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:11,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:04:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 20:04:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-25 20:04:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:04:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-25 20:04:11,605 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2021-11-25 20:04:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:11,605 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-25 20:04:11,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 54 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 20:04:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-25 20:04:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:04:11,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:11,607 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2021-11-25 20:04:11,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:11,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:11,807 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 88168223, now seen corresponding path program 11 times [2021-11-25 20:04:11,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61345169] [2021-11-25 20:04:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:11,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:12,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:12,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61345169] [2021-11-25 20:04:12,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61345169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:12,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780336446] [2021-11-25 20:04:12,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:04:12,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:12,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:12,350 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:12,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 20:04:12,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 20:04:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:04:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 20:04:12,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:12,748 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 20:04:13,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:04:13,132 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 20:04:13,174 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 20:04:13,190 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 20:04:13,207 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 20:04:13,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint 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 20:04:13,240 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 20:04:13,256 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 20:04:13,267 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 20:04:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:13,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:13,315 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-25 20:04:13,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:13,333 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:13,344 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-11-25 20:04:13,355 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:13,377 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:13,408 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1059) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:13,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:13,420 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 20:04:13,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:13,426 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 20:04:13,440 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 20:04:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 83 not checked. [2021-11-25 20:04:13,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780336446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:13,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030257402] [2021-11-25 20:04:13,647 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:13,648 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:13,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:13,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:13,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:13,687 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 20:04:13,722 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 20:04:13,760 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 20:04:13,795 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 20:04:13,839 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 20:04:13,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:13,905 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:13,906 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 20:04:13,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:13,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:13,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:14,041 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:04:14,042 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 20:04:14,117 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:14,118 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 20:04:14,211 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:15,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5699#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:15,655 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:15,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:15,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 44 [2021-11-25 20:04:15,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750422997] [2021-11-25 20:04:15,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:15,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 20:04:15,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 20:04:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1862, Unknown=7, NotChecked=644, Total=2652 [2021-11-25 20:04:15,657 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 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 20:04:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:16,559 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-25 20:04:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 20:04:16,560 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 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) Word has length 45 [2021-11-25 20:04:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:16,560 INFO L225 Difference]: With dead ends: 76 [2021-11-25 20:04:16,560 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 20:04:16,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 109 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=225, Invalid=2988, Unknown=7, NotChecked=812, Total=4032 [2021-11-25 20:04:16,562 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:16,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1024 Invalid, 0 Unknown, 234 Unchecked, 0.4s Time] [2021-11-25 20:04:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 20:04:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-11-25 20:04:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:04:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-25 20:04:16,571 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-11-25 20:04:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:16,571 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-25 20:04:16,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 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 20:04:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-25 20:04:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 20:04:16,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:16,572 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2021-11-25 20:04:16,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:16,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 20:04:16,778 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1686310993, now seen corresponding path program 12 times [2021-11-25 20:04:16,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:16,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613736467] [2021-11-25 20:04:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:16,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:17,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613736467] [2021-11-25 20:04:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613736467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509636635] [2021-11-25 20:04:17,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:04:17,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:17,182 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:17,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 20:04:17,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:04:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:04:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 20:04:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 72 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:17,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:18,034 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 20:04:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 72 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509636635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:18,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903818569] [2021-11-25 20:04:18,081 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:18,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:18,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:18,081 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:18,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:18,117 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 20:04:18,158 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 11 treesize of output 7 [2021-11-25 20:04:18,213 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 20:04:18,232 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 20:04:18,278 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 20:04:18,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:18,383 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:18,384 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 20:04:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:18,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:18,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:18,475 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:04:18,476 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 20:04:18,533 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:18,533 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 20:04:18,590 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:19,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6185#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:19,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:19,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:19,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-11-25 20:04:19,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620070000] [2021-11-25 20:04:19,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:19,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 20:04:19,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 20:04:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 20:04:19,930 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 44 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 20:04:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:20,489 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-25 20:04:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 20:04:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 44 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) Word has length 47 [2021-11-25 20:04:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:20,490 INFO L225 Difference]: With dead ends: 55 [2021-11-25 20:04:20,490 INFO L226 Difference]: Without dead ends: 55 [2021-11-25 20:04:20,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 20:04:20,491 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 149 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:20,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:04:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-25 20:04:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-25 20:04:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.06) internal successors, (53), 51 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 20:04:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-25 20:04:20,494 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-11-25 20:04:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:20,495 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-25 20:04:20,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 44 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 20:04:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-25 20:04:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:04:20,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:20,496 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2021-11-25 20:04:20,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:20,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 20:04:20,706 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash 736033218, now seen corresponding path program 8 times [2021-11-25 20:04:20,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129696623] [2021-11-25 20:04:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:20,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 49 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:21,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129696623] [2021-11-25 20:04:21,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129696623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:21,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570861228] [2021-11-25 20:04:21,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:04:21,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:21,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:21,136 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:21,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 20:04:21,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 20:04:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:04:21,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-25 20:04:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:21,707 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 20:04:21,715 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 20:04:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 20:04:22,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 20:04:23,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570861228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:23,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298266444] [2021-11-25 20:04:23,254 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:23,254 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:23,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:23,255 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:23,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:23,289 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 20:04:23,329 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 20:04:23,378 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 20:04:23,406 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 20:04:23,454 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 20:04:23,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:23,524 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:23,524 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 20:04:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:23,632 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:04:23,633 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 54 treesize of output 56 [2021-11-25 20:04:23,711 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:23,711 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 20:04:23,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:25,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6649#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:25,403 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:25,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:25,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 44 [2021-11-25 20:04:25,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179639796] [2021-11-25 20:04:25,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:25,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-25 20:04:25,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-25 20:04:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2460, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 20:04:25,405 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 45 states, 44 states have (on average 2.5) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 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 20:04:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:28,641 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-11-25 20:04:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 20:04:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.5) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 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 20:04:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:28,642 INFO L225 Difference]: With dead ends: 83 [2021-11-25 20:04:28,643 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 20:04:28,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1479, Invalid=7641, Unknown=0, NotChecked=0, Total=9120 [2021-11-25 20:04:28,646 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 178 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:28,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 699 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2021-11-25 20:04:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 20:04:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-11-25 20:04:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 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 20:04:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-25 20:04:28,659 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 48 [2021-11-25 20:04:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:28,660 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-25 20:04:28,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.5) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 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 20:04:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-25 20:04:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:04:28,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:28,662 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2021-11-25 20:04:28,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:28,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:28,882 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1341681048, now seen corresponding path program 13 times [2021-11-25 20:04:28,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:28,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838678893] [2021-11-25 20:04:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:28,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:29,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:29,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838678893] [2021-11-25 20:04:29,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838678893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:29,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59057670] [2021-11-25 20:04:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:04:29,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:29,546 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:29,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 20:04:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-25 20:04:29,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:29,738 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 20:04:30,174 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 20:04:30,250 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 20:04:30,289 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 20:04:30,303 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 20:04:30,318 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 20:04:30,333 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 20:04:30,349 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 20:04:30,364 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 20:04:30,379 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 20:04:30,387 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 20:04:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:30,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:30,428 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)))) is different from false [2021-11-25 20:04:30,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:30,461 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:30,473 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-11-25 20:04:30,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:30,495 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:30,505 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:04:30,515 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-11-25 20:04:30,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:30,525 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 20:04:30,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:30,531 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 20:04:30,537 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 20:04:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 107 not checked. [2021-11-25 20:04:30,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59057670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:30,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205891438] [2021-11-25 20:04:30,771 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:30,771 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:30,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:30,772 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:30,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:30,807 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 20:04:30,837 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 20:04:30,868 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 20:04:30,887 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 20:04:30,931 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 20:04:30,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:31,001 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:31,001 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 20:04:31,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:31,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:31,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:31,074 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:04:31,074 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 54 treesize of output 56 [2021-11-25 20:04:31,156 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:31,156 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 20:04:31,208 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:32,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7264#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:32,598 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:32,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:32,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 25] total 48 [2021-11-25 20:04:32,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390575479] [2021-11-25 20:04:32,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:32,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 20:04:32,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 20:04:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2131, Unknown=8, NotChecked=792, Total=3080 [2021-11-25 20:04:32,600 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:04:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:33,549 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-11-25 20:04:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 20:04:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 20:04:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:33,551 INFO L225 Difference]: With dead ends: 108 [2021-11-25 20:04:33,551 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 20:04:33,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 123 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=242, Invalid=3442, Unknown=8, NotChecked=1000, Total=4692 [2021-11-25 20:04:33,552 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:33,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1103 Invalid, 0 Unknown, 298 Unchecked, 0.4s Time] [2021-11-25 20:04:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 20:04:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-25 20:04:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 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 20:04:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-11-25 20:04:33,557 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 50 [2021-11-25 20:04:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:33,557 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-11-25 20:04:33,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 48 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:04:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-11-25 20:04:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:04:33,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:33,558 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2021-11-25 20:04:33,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:33,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 20:04:33,770 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1220294538, now seen corresponding path program 14 times [2021-11-25 20:04:33,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755560660] [2021-11-25 20:04:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:33,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 64 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:34,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755560660] [2021-11-25 20:04:34,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755560660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302674015] [2021-11-25 20:04:34,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:04:34,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:34,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:34,179 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:34,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 20:04:34,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-25 20:04:34,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:04:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-25 20:04:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:34,875 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 20:04:34,879 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 20:04:35,156 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 20:04:35,219 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 20:04:35,297 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 20:04:35,390 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 20:04:35,475 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 20:04:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint 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 20:04:35,640 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 20:04:35,721 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 20:04:35,831 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 20:04:35,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:35,917 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 17 [2021-11-25 20:04:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 19 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 20:04:36,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:36,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:36,892 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 20:04:36,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:04:36,897 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 20:04:36,900 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 20:04:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 20:04:37,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302674015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:37,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124786807] [2021-11-25 20:04:37,412 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:37,413 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:37,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:37,413 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:37,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:37,462 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 20:04:37,485 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 20:04:37,520 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 20:04:37,543 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 20:04:37,585 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 20:04:37,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:37,645 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:37,645 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 20:04:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:37,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:37,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:37,733 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:04:37,733 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 54 treesize of output 56 [2021-11-25 20:04:37,777 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:37,777 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 20:04:37,831 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:39,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7854#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:39,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:39,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:39,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 17] total 53 [2021-11-25 20:04:39,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979709688] [2021-11-25 20:04:39,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:39,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-25 20:04:39,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-25 20:04:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3418, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 20:04:39,362 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 54 states, 53 states have (on average 2.30188679245283) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 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 20:04:40,953 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse7 (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) (.cse5 (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse6 (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) (.cse8 (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (.cse0 (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse3 (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse2 (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|))) (and (or (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (< .cse0 0) (<= .cse1 .cse2) (< .cse2 .cse3)) (or (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (<= .cse4 .cse2) (< .cse2 .cse5) (< .cse6 0)) (or (< .cse2 .cse4) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (< .cse5 0) (<= .cse7 .cse2)) (<= 8 |c_ULTIMATE.start_cstpcpy_~from#1.offset|) (or (<= .cse6 .cse2) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (< .cse3 0) (< .cse2 .cse1)) (<= .cse0 .cse2) (<= .cse8 .cse2) (or (= |c_ULTIMATE.start_cstpcpy_#t~mem4#1| 0) (< .cse8 .cse2)) (or (< .cse4 0) (< .cse2 .cse7) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (<= (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|) .cse2)) (or (<= .cse5 .cse2) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) (< .cse2 .cse6) (< .cse1 0)) (or (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (< .cse8 0) (< .cse2 .cse0) (<= .cse3 .cse2)) (= |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8))) is different from false [2021-11-25 20:04:41,304 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse5 (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse6 (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) (.cse3 (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse0 (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) (.cse2 (select |c_#length| |c_ULTIMATE.start_cstpcpy_~from#1.base|)) (.cse7 (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1))) (and (or (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (< .cse0 0) (<= .cse1 .cse2) (< .cse2 .cse3)) (or (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (<= .cse4 .cse2) (< .cse2 .cse5) (< .cse6 0)) (or (< .cse2 .cse4) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (< .cse5 0) (<= (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8) .cse2)) (or (<= .cse6 .cse2) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) (< .cse3 0) (< .cse2 .cse1)) (or (<= .cse5 .cse2) (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) (< .cse2 .cse6) (< .cse1 0)) (or (forall ((v_ArrVal_1426 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1426) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) (< .cse7 0) (< .cse2 .cse0) (<= .cse3 .cse2)) (or (= |c_ULTIMATE.start_cstpcpy_#t~mem4#1| 0) (and (<= .cse0 .cse2) (<= 0 .cse7))))) is different from false [2021-11-25 20:04:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:42,929 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-11-25 20:04:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-25 20:04:42,930 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.30188679245283) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 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 52 [2021-11-25 20:04:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:42,930 INFO L225 Difference]: With dead ends: 79 [2021-11-25 20:04:42,930 INFO L226 Difference]: Without dead ends: 79 [2021-11-25 20:04:42,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1470, Invalid=10947, Unknown=23, NotChecked=442, Total=12882 [2021-11-25 20:04:42,932 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:42,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 276 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-11-25 20:04:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-25 20:04:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-25 20:04:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 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 20:04:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-11-25 20:04:42,935 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 52 [2021-11-25 20:04:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:42,935 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-11-25 20:04:42,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.30188679245283) internal successors, (122), 54 states have internal predecessors, (122), 0 states have call successors, (0), 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 20:04:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-11-25 20:04:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:04:42,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:42,936 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 10, 10, 1, 1, 1, 1, 1] [2021-11-25 20:04:42,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-25 20:04:43,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-25 20:04:43,146 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2145391626, now seen corresponding path program 15 times [2021-11-25 20:04:43,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:43,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198133250] [2021-11-25 20:04:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:43,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 334 proven. 128 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 20:04:43,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198133250] [2021-11-25 20:04:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198133250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:43,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424715924] [2021-11-25 20:04:43,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:04:43,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:43,576 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 20:04:43,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:04:43,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:04:43,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 20:04:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:43,801 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:04:43,802 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 20:04:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 362 proven. 100 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 20:04:44,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 352 proven. 110 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-25 20:04:45,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424715924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:45,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168796885] [2021-11-25 20:04:45,107 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:45,107 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:45,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:45,107 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:45,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:45,149 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 20:04:45,176 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 20:04:45,206 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 20:04:45,229 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 20:04:45,285 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 20:04:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:45,350 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:45,350 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 20:04:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:45,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:45,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:45,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:45,440 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:04:45,441 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 20:04:45,495 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:45,495 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 20:04:45,556 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:46,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8650#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:46,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:46,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:46,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 61 [2021-11-25 20:04:46,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786546141] [2021-11-25 20:04:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:46,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-25 20:04:46,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-25 20:04:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=3959, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 20:04:46,930 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 61 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 states have internal predecessors, (138), 0 states have call successors, (0), 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 20:04:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:47,358 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-11-25 20:04:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 20:04:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 states have internal predecessors, (138), 0 states have call successors, (0), 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 20:04:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:47,359 INFO L225 Difference]: With dead ends: 114 [2021-11-25 20:04:47,359 INFO L226 Difference]: Without dead ends: 82 [2021-11-25 20:04:47,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1137, Invalid=5343, Unknown=0, NotChecked=0, Total=6480 [2021-11-25 20:04:47,359 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:47,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-25 20:04:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-25 20:04:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 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 20:04:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-11-25 20:04:47,362 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2021-11-25 20:04:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:47,362 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-11-25 20:04:47,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 states have internal predecessors, (138), 0 states have call successors, (0), 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 20:04:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-11-25 20:04:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:04:47,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:47,362 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 11, 11, 1, 1, 1, 1, 1] [2021-11-25 20:04:47,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:47,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:47,563 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:47,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash -262959996, now seen corresponding path program 16 times [2021-11-25 20:04:47,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:47,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67658605] [2021-11-25 20:04:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:47,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 349 proven. 152 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 20:04:47,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67658605] [2021-11-25 20:04:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67658605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730597252] [2021-11-25 20:04:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:04:47,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:47,994 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 20:04:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 20:04:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:48,195 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:04:48,195 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 20:04:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 380 proven. 121 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 20:04:49,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 369 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 20:04:49,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730597252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242879813] [2021-11-25 20:04:49,662 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:49,662 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:49,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:49,663 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:49,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:49,689 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 20:04:49,720 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 20:04:49,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 20:04:49,786 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 20:04:49,828 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 20:04:49,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:49,882 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:49,882 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 20:04:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:49,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:49,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:49,980 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:04:49,981 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 50 treesize of output 54 [2021-11-25 20:04:50,031 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:50,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:04:50,091 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:04:51,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9405#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:04:51,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:04:51,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:04:51,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 66 [2021-11-25 20:04:51,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699263608] [2021-11-25 20:04:51,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:04:51,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 20:04:51,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:51,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 20:04:51,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=4552, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 20:04:51,507 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 66 states have internal predecessors, (150), 0 states have call successors, (0), 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 20:04:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:52,024 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-11-25 20:04:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:04:52,025 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 66 states have internal predecessors, (150), 0 states have call successors, (0), 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 78 [2021-11-25 20:04:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:52,025 INFO L225 Difference]: With dead ends: 119 [2021-11-25 20:04:52,025 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 20:04:52,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1320, Invalid=6162, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 20:04:52,026 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:52,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 3 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 20:04:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-25 20:04:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 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 20:04:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-11-25 20:04:52,030 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2021-11-25 20:04:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:52,030 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-11-25 20:04:52,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.272727272727273) internal successors, (150), 66 states have internal predecessors, (150), 0 states have call successors, (0), 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 20:04:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-11-25 20:04:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:04:52,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:52,031 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 12, 12, 1, 1, 1, 1, 1] [2021-11-25 20:04:52,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:52,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-25 20:04:52,242 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:04:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash 572604818, now seen corresponding path program 17 times [2021-11-25 20:04:52,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:52,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362938121] [2021-11-25 20:04:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:52,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 379 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:04:52,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:52,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362938121] [2021-11-25 20:04:52,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362938121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:52,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20323866] [2021-11-25 20:04:52,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:04:52,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:52,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:52,847 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:52,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 20:04:56,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-25 20:04:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:04:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 20:04:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:56,092 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:04:56,092 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 20:04:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 425 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:57,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 425 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:04:58,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20323866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:04:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2006154449] [2021-11-25 20:04:58,269 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:04:58,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:04:58,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:04:58,269 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:04:58,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:04:58,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:58,305 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 20:04:58,345 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 20:04:58,373 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 20:04:58,391 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 20:04:58,433 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 20:04:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:58,500 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:04:58,500 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 20:04:58,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:58,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:04:58,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:58,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:04:58,588 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:04:58,588 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 20:04:58,637 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:04:58,637 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 20:04:58,698 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:05:00,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10197#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:05:00,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:05:00,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:05:00,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 82 [2021-11-25 20:05:00,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159607841] [2021-11-25 20:05:00,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:05:00,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-25 20:05:00,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:00,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-25 20:05:00,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=6620, Unknown=0, NotChecked=0, Total=8010 [2021-11-25 20:05:00,229 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 82 states, 82 states have (on average 2.402439024390244) internal successors, (197), 82 states have internal predecessors, (197), 0 states have call successors, (0), 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 20:05:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:01,302 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2021-11-25 20:05:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-25 20:05:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.402439024390244) internal successors, (197), 82 states have internal predecessors, (197), 0 states have call successors, (0), 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 80 [2021-11-25 20:05:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:01,303 INFO L225 Difference]: With dead ends: 181 [2021-11-25 20:05:01,303 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 20:05:01,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4052 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2688, Invalid=11832, Unknown=0, NotChecked=0, Total=14520 [2021-11-25 20:05:01,304 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:01,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 3 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:05:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 20:05:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-25 20:05:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 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 20:05:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-25 20:05:01,307 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 80 [2021-11-25 20:05:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:01,307 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-25 20:05:01,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.402439024390244) internal successors, (197), 82 states have internal predecessors, (197), 0 states have call successors, (0), 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 20:05:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-25 20:05:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 20:05:01,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:01,309 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 20:05:01,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-25 20:05:01,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 20:05:01,522 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:05:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1576559016, now seen corresponding path program 18 times [2021-11-25 20:05:01,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:01,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209725230] [2021-11-25 20:05:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:01,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 17 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:02,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209725230] [2021-11-25 20:05:02,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209725230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950446349] [2021-11-25 20:05:02,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:05:02,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:02,931 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:02,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 20:05:03,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:05:03,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:05:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 177 conjunts are in the unsatisfiable core [2021-11-25 20:05:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:03,187 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 20:05:03,190 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 20:05:04,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:05:04,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:05:04,390 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 14 treesize of output 16 [2021-11-25 20:05:04,463 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 20:05:04,535 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 20:05:04,611 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 20:05:04,684 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 20:05:04,758 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 14 treesize of output 16 [2021-11-25 20:05:04,833 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 20:05:04,910 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 20:05:04,992 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 20:05:05,075 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 20:05:05,179 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 20:05:05,285 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 20:05:05,386 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 20:05:05,465 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 20:05:05,544 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 20:05:05,626 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 20:05:05,746 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 20:05:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 17 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:05,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:05:05,840 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-11-25 20:05:05,846 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,854 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-11-25 20:05:05,872 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,890 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-11-25 20:05:05,908 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,916 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 10)) 0)) is different from false [2021-11-25 20:05:05,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 11)) 0)) is different from false [2021-11-25 20:05:05,933 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 12)) 0)) is different from false [2021-11-25 20:05:05,942 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 13)) 0)) is different from false [2021-11-25 20:05:05,953 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 14 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:05,962 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 15)) 0)) is different from false [2021-11-25 20:05:05,978 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1981 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1981) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 16 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-11-25 20:05:06,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:05:06,063 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 20:05:06,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:05:06,068 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 20:05:06,071 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 20:05:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 17 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 406 not checked. [2021-11-25 20:05:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950446349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:05:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853924648] [2021-11-25 20:05:07,842 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:05:07,842 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:05:07,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:05:07,843 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:05:07,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:05:07,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:07,866 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 20:05:07,894 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 20:05:07,923 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 20:05:07,949 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 20:05:07,988 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 20:05:08,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:08,055 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:05:08,055 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 20:05:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:08,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:08,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:08,127 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:05:08,127 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 54 treesize of output 56 [2021-11-25 20:05:08,218 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:05:08,218 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 20:05:08,308 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:05:10,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11189#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:05:10,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:05:10,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:05:10,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 114 [2021-11-25 20:05:10,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336087785] [2021-11-25 20:05:10,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:05:10,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-25 20:05:10,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:10,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-25 20:05:10,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=10855, Unknown=16, NotChecked=3568, Total=14762 [2021-11-25 20:05:10,546 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 114 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 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 20:05:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:15,755 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-11-25 20:05:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-25 20:05:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 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 20:05:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:15,757 INFO L225 Difference]: With dead ends: 148 [2021-11-25 20:05:15,757 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 20:05:15,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 203 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 3884 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=645, Invalid=20283, Unknown=16, NotChecked=4816, Total=25760 [2021-11-25 20:05:15,758 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 6392 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 7942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 6392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1463 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:15,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 98 Invalid, 7942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 6392 Invalid, 0 Unknown, 1463 Unchecked, 2.4s Time] [2021-11-25 20:05:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 20:05:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-25 20:05:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.032258064516129) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 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 20:05:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-25 20:05:15,761 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2021-11-25 20:05:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:15,761 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-25 20:05:15,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 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 20:05:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-25 20:05:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:05:15,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:15,763 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 20:05:15,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-25 20:05:15,979 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:05:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 924331622, now seen corresponding path program 19 times [2021-11-25 20:05:15,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326087687] [2021-11-25 20:05:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:15,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 256 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:16,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326087687] [2021-11-25 20:05:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326087687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994165470] [2021-11-25 20:05:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:05:16,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:16,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:16,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 20:05:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 20:05:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 306 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:05:18,945 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 20:05:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 306 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:19,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994165470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:05:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647428880] [2021-11-25 20:05:19,008 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:05:19,008 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:05:19,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:05:19,008 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:05:19,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:05:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:19,044 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 20:05:19,068 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 11 treesize of output 7 [2021-11-25 20:05:19,100 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 20:05:19,120 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 20:05:19,162 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 20:05:19,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:19,219 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:05:19,219 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 20:05:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:19,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:19,359 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:05:19,359 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 20:05:19,421 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:05:19,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:05:19,492 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:05:21,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12161#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:05:21,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:05:21,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:05:21,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2021-11-25 20:05:21,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320729338] [2021-11-25 20:05:21,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:05:21,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-25 20:05:21,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-25 20:05:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=6969, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 20:05:21,229 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 80 states, 79 states have (on average 2.392405063291139) internal successors, (189), 80 states have internal predecessors, (189), 0 states have call successors, (0), 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 20:05:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:23,382 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-11-25 20:05:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 20:05:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.392405063291139) internal successors, (189), 80 states have internal predecessors, (189), 0 states have call successors, (0), 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 92 [2021-11-25 20:05:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:23,383 INFO L225 Difference]: With dead ends: 100 [2021-11-25 20:05:23,384 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 20:05:23,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2550, Invalid=12950, Unknown=0, NotChecked=0, Total=15500 [2021-11-25 20:05:23,385 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 342 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:23,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 1 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:05:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 20:05:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-11-25 20:05:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-11-25 20:05:23,387 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2021-11-25 20:05:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-11-25 20:05:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.392405063291139) internal successors, (189), 80 states have internal predecessors, (189), 0 states have call successors, (0), 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 20:05:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-11-25 20:05:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:05:23,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:23,389 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-25 20:05:23,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-25 20:05:23,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-25 20:05:23,595 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:05:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:23,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1410490803, now seen corresponding path program 9 times [2021-11-25 20:05:23,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781866599] [2021-11-25 20:05:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:23,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 256 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:24,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:24,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781866599] [2021-11-25 20:05:24,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781866599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:24,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212861719] [2021-11-25 20:05:24,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:05:24,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:24,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:24,571 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:24,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 20:05:24,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:05:24,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:05:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-25 20:05:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:24,890 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:05:24,890 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 20:05:24,909 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 20:05:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 306 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:27,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:05:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 324 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:30,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212861719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:05:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997491723] [2021-11-25 20:05:30,600 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:05:30,600 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:05:30,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:05:30,601 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:05:30,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:05:30,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:30,642 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 20:05:30,669 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 20:05:30,701 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 20:05:30,722 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 20:05:30,756 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 20:05:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:30,823 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:05:30,823 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 20:05:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:30,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:30,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:30,924 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:05:30,924 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 20:05:30,971 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:05:30,971 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 20:05:31,037 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:05:33,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13107#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:05:33,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:05:33,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:05:33,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 114 [2021-11-25 20:05:33,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879046163] [2021-11-25 20:05:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:05:33,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-25 20:05:33,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-25 20:05:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=13717, Unknown=0, NotChecked=0, Total=15006 [2021-11-25 20:05:33,050 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 115 states, 114 states have (on average 2.4298245614035086) internal successors, (277), 115 states have internal predecessors, (277), 0 states have call successors, (0), 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 20:05:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:34,740 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2021-11-25 20:05:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 20:05:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 2.4298245614035086) internal successors, (277), 115 states have internal predecessors, (277), 0 states have call successors, (0), 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 93 [2021-11-25 20:05:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:34,741 INFO L225 Difference]: With dead ends: 99 [2021-11-25 20:05:34,741 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 20:05:34,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2131, Invalid=18461, Unknown=0, NotChecked=0, Total=20592 [2021-11-25 20:05:34,743 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:34,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1311 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2021-11-25 20:05:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 20:05:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-25 20:05:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.03125) 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 20:05:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-11-25 20:05:34,747 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2021-11-25 20:05:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:34,747 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-11-25 20:05:34,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 2.4298245614035086) internal successors, (277), 115 states have internal predecessors, (277), 0 states have call successors, (0), 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 20:05:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-11-25 20:05:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 20:05:34,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:34,748 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2021-11-25 20:05:34,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:34,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:34,955 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:05:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1728004147, now seen corresponding path program 20 times [2021-11-25 20:05:34,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166116511] [2021-11-25 20:05:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:34,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 18 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:36,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:36,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166116511] [2021-11-25 20:05:36,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166116511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:36,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637077653] [2021-11-25 20:05:36,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:05:36,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:36,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:36,198 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:36,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 20:05:44,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-25 20:05:44,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:05:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-25 20:05:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:44,845 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 20:05:44,850 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 20:05:45,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:05:45,316 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 20:05:45,392 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 20:05:45,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:05:45,566 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 20:05:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:05:45,777 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 20:05:45,875 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 20:05:45,970 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 20:05:46,063 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 17 treesize of output 19 [2021-11-25 20:05:46,148 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 20:05:46,234 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 20:05:46,319 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 20:05:46,416 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 20:05:46,505 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 20:05:46,615 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 20:05:46,742 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 20:05:46,822 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 20:05:46,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:05:46,948 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 18 [2021-11-25 20:05:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 35 proven. 69 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-11-25 20:05:47,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:05:48,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:05:48,092 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 20:05:48,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:05:48,100 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 20:05:48,105 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 20:05:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-11-25 20:05:48,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637077653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:05:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739247289] [2021-11-25 20:05:48,812 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:05:48,812 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:05:48,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:05:48,812 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:05:48,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:05:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:48,843 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 20:05:48,893 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 20:05:48,926 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 20:05:48,946 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 20:05:48,982 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 20:05:49,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:49,044 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:05:49,044 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 20:05:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:49,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:49,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:49,179 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:05:49,180 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 20:05:49,231 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:05:49,231 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 20:05:49,296 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:05:51,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13976#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|) (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1)) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:05:51,077 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:05:51,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:05:51,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 8, 8] total 56 [2021-11-25 20:05:51,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677354840] [2021-11-25 20:05:51,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:05:51,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 20:05:51,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 20:05:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3844, Unknown=22, NotChecked=0, Total=4032 [2021-11-25 20:05:51,079 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 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 20:05:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:55,341 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-11-25 20:05:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-25 20:05:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 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 20:05:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:55,342 INFO L225 Difference]: With dead ends: 154 [2021-11-25 20:05:55,343 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 20:05:55,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=970, Invalid=18748, Unknown=22, NotChecked=0, Total=19740 [2021-11-25 20:05:55,344 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 55 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:55,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 20 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1633 Invalid, 0 Unknown, 47 Unchecked, 0.7s Time] [2021-11-25 20:05:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 20:05:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-25 20:05:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 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 20:05:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-11-25 20:05:55,348 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2021-11-25 20:05:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:55,348 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-11-25 20:05:55,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.25) internal successors, (126), 56 states have internal predecessors, (126), 0 states have call successors, (0), 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 20:05:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-11-25 20:05:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:05:55,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:55,350 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2021-11-25 20:05:55,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:55,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 20:05:55,571 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:05:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1743033262, now seen corresponding path program 10 times [2021-11-25 20:05:55,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:55,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444231241] [2021-11-25 20:05:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:55,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 289 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:56,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:56,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444231241] [2021-11-25 20:05:56,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444231241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861971130] [2021-11-25 20:05:56,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:05:56,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:56,689 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:56,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 20:05:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-25 20:05:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:56,983 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 20:05:56,986 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 20:05:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 324 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 361 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861971130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196849763] [2021-11-25 20:06:01,847 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:06:01,847 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:06:01,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:06:01,848 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:06:01,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:06:01,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:01,889 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 20:06:01,928 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 20:06:01,970 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 14 treesize of output 10 [2021-11-25 20:06:01,999 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 20:06:02,064 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 20:06:02,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:02,151 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:06:02,151 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 20:06:02,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:02,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:02,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:02,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:02,267 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 20:06:02,267 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 20:06:02,313 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:06:02,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20:06:02,377 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:06:04,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15112#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:06:04,403 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:06:04,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:06:04,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 119 [2021-11-25 20:06:04,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027841632] [2021-11-25 20:06:04,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:04,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-25 20:06:04,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-25 20:06:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=14653, Unknown=0, NotChecked=0, Total=16256 [2021-11-25 20:06:04,405 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 120 states, 119 states have (on average 2.453781512605042) internal successors, (292), 120 states have internal predecessors, (292), 0 states have call successors, (0), 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 20:06:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:07,462 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-11-25 20:06:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-25 20:06:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 2.453781512605042) internal successors, (292), 120 states have internal predecessors, (292), 0 states have call successors, (0), 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 98 [2021-11-25 20:06:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:07,463 INFO L225 Difference]: With dead ends: 103 [2021-11-25 20:06:07,463 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 20:06:07,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7045 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4269, Invalid=23453, Unknown=0, NotChecked=0, Total=27722 [2021-11-25 20:06:07,465 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 452 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2891 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:07,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2891 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:06:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 20:06:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-25 20:06:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-25 20:06:07,468 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2021-11-25 20:06:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:07,468 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-25 20:06:07,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 2.453781512605042) internal successors, (292), 120 states have internal predecessors, (292), 0 states have call successors, (0), 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 20:06:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-25 20:06:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 20:06:07,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:07,470 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1] [2021-11-25 20:06:07,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:07,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 20:06:07,683 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:06:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 549308703, now seen corresponding path program 11 times [2021-11-25 20:06:07,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:07,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338151744] [2021-11-25 20:06:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:07,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 496 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:08,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338151744] [2021-11-25 20:06:08,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338151744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:06:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454242471] [2021-11-25 20:06:08,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:06:08,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:08,621 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:08,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 20:06:19,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-25 20:06:19,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:06:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-25 20:06:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:19,065 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:06:19,066 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 20:06:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 551 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:21,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 551 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454242471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168315268] [2021-11-25 20:06:22,504 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:06:22,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:06:22,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:06:22,504 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:06:22,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:06:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:22,549 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 20:06:22,580 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 20:06:22,609 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 20:06:22,643 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 20:06:22,713 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 20:06:22,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:22,764 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:06:22,765 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 20:06:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:22,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:22,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:22,845 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:06:22,845 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 54 treesize of output 56 [2021-11-25 20:06:22,907 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:06:22,907 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 20:06:22,974 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:06:24,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16109#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:06:24,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:06:24,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:06:24,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 106 [2021-11-25 20:06:24,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422465346] [2021-11-25 20:06:24,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-25 20:06:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-25 20:06:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1902, Invalid=10980, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 20:06:24,637 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 106 states, 106 states have (on average 2.30188679245283) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 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 20:06:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:26,689 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2021-11-25 20:06:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 20:06:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.30188679245283) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 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 101 [2021-11-25 20:06:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:26,691 INFO L225 Difference]: With dead ends: 164 [2021-11-25 20:06:26,691 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 20:06:26,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6708 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3900, Invalid=19662, Unknown=0, NotChecked=0, Total=23562 [2021-11-25 20:06:26,693 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:26,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:06:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 20:06:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-25 20:06:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 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 20:06:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-11-25 20:06:26,696 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2021-11-25 20:06:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:26,697 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-11-25 20:06:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.30188679245283) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 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 20:06:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-11-25 20:06:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 20:06:26,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:26,698 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2021-11-25 20:06:26,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:26,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:26,915 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:06:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 443171921, now seen corresponding path program 12 times [2021-11-25 20:06:26,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:26,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641799593] [2021-11-25 20:06:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:26,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 324 proven. 627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:27,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:27,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641799593] [2021-11-25 20:06:27,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641799593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:06:27,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479310922] [2021-11-25 20:06:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:06:27,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:27,888 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:27,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 20:06:28,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:06:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:06:28,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-25 20:06:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:28,177 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 20:06:28,186 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 20:06:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 380 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:32,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 400 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:35,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479310922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675481177] [2021-11-25 20:06:35,192 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:06:35,192 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:06:35,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:06:35,192 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:06:35,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:06:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:35,223 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 20:06:35,248 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 20:06:35,278 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 20:06:35,297 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 20:06:35,340 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 20:06:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:35,416 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:06:35,416 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 20:06:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:35,491 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:06:35,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 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 20:06:35,551 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:06:35,551 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 20:06:35,613 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:06:37,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17204#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:06:37,729 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:06:37,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:06:37,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 126 [2021-11-25 20:06:37,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542012421] [2021-11-25 20:06:37,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:37,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-25 20:06:37,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-25 20:06:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1547, Invalid=16543, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 20:06:37,731 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 127 states, 126 states have (on average 2.4365079365079363) internal successors, (307), 127 states have internal predecessors, (307), 0 states have call successors, (0), 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 20:06:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:39,604 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-11-25 20:06:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 20:06:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 2.4365079365079363) internal successors, (307), 127 states have internal predecessors, (307), 0 states have call successors, (0), 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 103 [2021-11-25 20:06:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:39,605 INFO L225 Difference]: With dead ends: 108 [2021-11-25 20:06:39,605 INFO L226 Difference]: Without dead ends: 108 [2021-11-25 20:06:39,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7138 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2561, Invalid=22245, Unknown=0, NotChecked=0, Total=24806 [2021-11-25 20:06:39,607 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:39,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1266 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2021-11-25 20:06:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-25 20:06:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-25 20:06:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 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 20:06:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-11-25 20:06:39,617 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 103 [2021-11-25 20:06:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:39,617 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-11-25 20:06:39,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 2.4365079365079363) internal successors, (307), 127 states have internal predecessors, (307), 0 states have call successors, (0), 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 20:06:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-11-25 20:06:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 20:06:39,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:39,618 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2021-11-25 20:06:39,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:39,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-25 20:06:39,819 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:06:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash -194760292, now seen corresponding path program 13 times [2021-11-25 20:06:39,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:39,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260169947] [2021-11-25 20:06:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:39,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 552 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:40,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260169947] [2021-11-25 20:06:40,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260169947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:06:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617773306] [2021-11-25 20:06:40,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:06:40,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:40,806 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:40,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 20:06:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-25 20:06:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:41,101 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:06:41,101 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 20:06:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 610 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:43,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 590 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:44,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617773306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928819968] [2021-11-25 20:06:44,609 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:06:44,609 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:06:44,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:06:44,609 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:06:44,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:06:44,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:44,636 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 20:06:44,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 20:06:44,710 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 20:06:44,728 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 20:06:44,778 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 20:06:44,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:44,852 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:06:44,853 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 20:06:44,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:44,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:44,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:44,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:06:44,948 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:06:44,948 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 20:06:44,996 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:06:44,996 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 20:06:45,043 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:06:46,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18216#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:06:46,689 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:06:46,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:06:46,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 111 [2021-11-25 20:06:46,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37482748] [2021-11-25 20:06:46,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:46,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-25 20:06:46,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-25 20:06:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2078, Invalid=11964, Unknown=0, NotChecked=0, Total=14042 [2021-11-25 20:06:46,691 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 111 states, 111 states have (on average 2.2972972972972974) internal successors, (255), 111 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 20:06:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:48,871 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-11-25 20:06:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 20:06:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.2972972972972974) internal successors, (255), 111 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 106 [2021-11-25 20:06:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:48,872 INFO L225 Difference]: With dead ends: 172 [2021-11-25 20:06:48,872 INFO L226 Difference]: Without dead ends: 110 [2021-11-25 20:06:48,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7410 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4269, Invalid=21491, Unknown=0, NotChecked=0, Total=25760 [2021-11-25 20:06:48,874 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:48,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 2 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:06:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-25 20:06:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-25 20:06:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 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 20:06:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-11-25 20:06:48,877 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2021-11-25 20:06:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:48,877 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-11-25 20:06:48,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.2972972972972974) internal successors, (255), 111 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 20:06:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-11-25 20:06:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:06:48,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:48,878 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-25 20:06:48,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:49,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-25 20:06:49,078 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:06:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1604249002, now seen corresponding path program 14 times [2021-11-25 20:06:49,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846436121] [2021-11-25 20:06:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:49,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 361 proven. 690 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:50,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:50,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846436121] [2021-11-25 20:06:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846436121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:06:50,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972343757] [2021-11-25 20:06:50,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:06:50,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:50,298 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:50,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 20:07:02,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-25 20:07:02,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:07:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-25 20:07:02,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:02,712 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 20:07:02,717 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 20:07:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-25 20:07:04,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-25 20:07:07,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972343757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:07,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64205401] [2021-11-25 20:07:07,055 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:07:07,055 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:07:07,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:07:07,056 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:07:07,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:07:07,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:07,083 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 20:07:07,115 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 20:07:07,145 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 20:07:07,168 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 20:07:07,198 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 20:07:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:07,266 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:07:07,267 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 20:07:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:07,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:07,370 INFO L354 Elim1Store]: treesize reduction 98, result has 15.5 percent of original size [2021-11-25 20:07:07,371 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 54 treesize of output 56 [2021-11-25 20:07:07,430 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:07:07,430 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 20:07:07,476 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:07:09,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19324#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:07:09,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:07:09,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:07:09,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 25, 25] total 92 [2021-11-25 20:07:09,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164343479] [2021-11-25 20:07:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:09,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-25 20:07:09,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-25 20:07:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1124, Invalid=8976, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 20:07:09,471 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 93 states, 92 states have (on average 2.630434782608696) internal successors, (242), 93 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 20:07:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:22,276 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-11-25 20:07:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-25 20:07:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 2.630434782608696) internal successors, (242), 93 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 108 [2021-11-25 20:07:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:22,277 INFO L225 Difference]: With dead ends: 172 [2021-11-25 20:07:22,277 INFO L226 Difference]: Without dead ends: 172 [2021-11-25 20:07:22,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6813 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=5642, Invalid=28030, Unknown=0, NotChecked=0, Total=33672 [2021-11-25 20:07:22,278 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 374 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 4043 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 4330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 4043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:22,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 2 Invalid, 4330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 4043 Invalid, 0 Unknown, 84 Unchecked, 1.7s Time] [2021-11-25 20:07:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-25 20:07:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-25 20:07:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 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 20:07:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2021-11-25 20:07:22,282 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 108 [2021-11-25 20:07:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:22,282 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2021-11-25 20:07:22,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 2.630434782608696) internal successors, (242), 93 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 20:07:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2021-11-25 20:07:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-25 20:07:22,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:22,283 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 21, 21, 1, 1, 1, 1, 1] [2021-11-25 20:07:22,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:22,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:22,483 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:07:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1748547613, now seen corresponding path program 15 times [2021-11-25 20:07:22,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466700431] [2021-11-25 20:07:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:22,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2983 backedges. 1891 proven. 502 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-25 20:07:23,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466700431] [2021-11-25 20:07:23,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466700431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574070512] [2021-11-25 20:07:23,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:07:23,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:23,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:23,648 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:23,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 20:07:24,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:07:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:07:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 20:07:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:24,042 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:07:24,043 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 20:07:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2983 backedges. 1952 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-25 20:07:26,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2983 backedges. 1931 proven. 462 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-25 20:07:28,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574070512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1252005853] [2021-11-25 20:07:28,011 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:07:28,011 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:07:28,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:07:28,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:07:28,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:07:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:28,046 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 20:07:28,073 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 20:07:28,126 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 20:07:28,146 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 20:07:28,191 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 20:07:28,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:28,241 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:07:28,241 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 20:07:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:28,323 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:07:28,323 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 20:07:28,384 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:07:28,384 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 20:07:28,429 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:07:30,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20979#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:07:30,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:07:30,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:07:30,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 116 [2021-11-25 20:07:30,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417299704] [2021-11-25 20:07:30,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:30,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-25 20:07:30,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-25 20:07:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2263, Invalid=12989, Unknown=0, NotChecked=0, Total=15252 [2021-11-25 20:07:30,137 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 116 states, 116 states have (on average 2.3275862068965516) internal successors, (270), 116 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 20:07:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:32,413 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2021-11-25 20:07:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 20:07:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3275862068965516) internal successors, (270), 116 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 171 [2021-11-25 20:07:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:32,414 INFO L225 Difference]: With dead ends: 240 [2021-11-25 20:07:32,414 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 20:07:32,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 435 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8071 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4657, Invalid=23399, Unknown=0, NotChecked=0, Total=28056 [2021-11-25 20:07:32,417 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 97 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:32,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 2 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:07:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 20:07:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-11-25 20:07:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 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 20:07:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-11-25 20:07:32,421 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2021-11-25 20:07:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:32,422 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-11-25 20:07:32,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3275862068965516) internal successors, (270), 116 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 20:07:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-11-25 20:07:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-25 20:07:32,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:32,423 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 22, 22, 1, 1, 1, 1, 1] [2021-11-25 20:07:32,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:32,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-25 20:07:32,631 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:07:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1642297963, now seen corresponding path program 16 times [2021-11-25 20:07:32,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151883741] [2021-11-25 20:07:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:32,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 1946 proven. 548 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-25 20:07:33,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151883741] [2021-11-25 20:07:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151883741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184432674] [2021-11-25 20:07:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:07:33,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:33,746 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:33,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-25 20:07:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-25 20:07:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:34,123 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:07:34,123 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 20:07:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 2010 proven. 484 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-25 20:07:36,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 1988 proven. 506 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-25 20:07:38,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184432674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017471278] [2021-11-25 20:07:38,407 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:07:38,408 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:07:38,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:07:38,408 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:07:38,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:07:38,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:38,440 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 20:07:38,470 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 20:07:38,508 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 20:07:38,535 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 20:07:38,574 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 20:07:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:38,641 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:07:38,642 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 20:07:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:38,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:07:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:38,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:07:38,725 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:07:38,725 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 20:07:38,807 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:07:38,807 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 20:07:38,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:07:40,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22642#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:07:40,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:07:40,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:07:40,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 121 [2021-11-25 20:07:40,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900658130] [2021-11-25 20:07:40,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:07:40,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-25 20:07:40,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-25 20:07:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=13803, Unknown=0, NotChecked=0, Total=16512 [2021-11-25 20:07:40,536 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 121 states, 121 states have (on average 2.330578512396694) internal successors, (282), 121 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 20:07:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:41,910 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2021-11-25 20:07:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 20:07:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.330578512396694) internal successors, (282), 121 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 173 [2021-11-25 20:07:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:41,912 INFO L225 Difference]: With dead ends: 245 [2021-11-25 20:07:41,912 INFO L226 Difference]: Without dead ends: 177 [2021-11-25 20:07:41,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6486 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4235, Invalid=19021, Unknown=0, NotChecked=0, Total=23256 [2021-11-25 20:07:41,915 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:41,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:07:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-25 20:07:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-11-25 20:07:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 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 20:07:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-11-25 20:07:41,919 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2021-11-25 20:07:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:41,920 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-11-25 20:07:41,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.330578512396694) internal successors, (282), 121 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 20:07:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-11-25 20:07:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 20:07:41,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:41,921 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 23, 23, 1, 1, 1, 1, 1] [2021-11-25 20:07:41,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:42,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:42,135 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:07:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1679367879, now seen corresponding path program 17 times [2021-11-25 20:07:42,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:42,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926507931] [2021-11-25 20:07:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:42,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 1998 proven. 596 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-25 20:07:43,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:43,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926507931] [2021-11-25 20:07:43,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926507931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:43,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979974165] [2021-11-25 20:07:43,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:07:43,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:43,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:43,363 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:43,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 20:10:12,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-25 20:10:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 161 conjunts are in the unsatisfiable core [2021-11-25 20:10:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:13,022 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:10:13,022 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 20:10:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 2542 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:18,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:10:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3071 backedges. 2542 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:22,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979974165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:10:22,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267964018] [2021-11-25 20:10:22,416 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:10:22,416 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:10:22,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:10:22,417 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:10:22,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:22,452 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 20:10:22,480 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 20:10:22,520 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 20:10:22,545 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 20:10:22,594 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 20:10:22,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:22,701 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:10:22,701 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 20:10:22,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:22,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:22,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:10:22,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:22,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:10:22,835 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 20:10:22,836 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 20:10:22,912 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:10:22,912 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 20:10:22,995 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:10:25,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24325#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:10:25,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:10:25,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:10:25,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 69, 69] total 162 [2021-11-25 20:10:25,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314942640] [2021-11-25 20:10:25,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:10:25,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-11-25 20:10:25,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:10:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-11-25 20:10:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5904, Invalid=22826, Unknown=0, NotChecked=0, Total=28730 [2021-11-25 20:10:25,513 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 162 states, 162 states have (on average 2.4876543209876543) internal successors, (403), 162 states have internal predecessors, (403), 0 states have call successors, (0), 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 20:10:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:10:30,293 INFO L93 Difference]: Finished difference Result 410 states and 428 transitions. [2021-11-25 20:10:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-25 20:10:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.4876543209876543) internal successors, (403), 162 states have internal predecessors, (403), 0 states have call successors, (0), 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 175 [2021-11-25 20:10:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:10:30,295 INFO L225 Difference]: With dead ends: 410 [2021-11-25 20:10:30,295 INFO L226 Difference]: Without dead ends: 214 [2021-11-25 20:10:30,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15972 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=11619, Invalid=44313, Unknown=0, NotChecked=0, Total=55932 [2021-11-25 20:10:30,299 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 123 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:10:30,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 2 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:10:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-25 20:10:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-11-25 20:10:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 213 states have internal predecessors, (215), 0 states have call successors, (0), 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 20:10:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2021-11-25 20:10:30,305 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 175 [2021-11-25 20:10:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:10:30,306 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2021-11-25 20:10:30,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.4876543209876543) internal successors, (403), 162 states have internal predecessors, (403), 0 states have call successors, (0), 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 20:10:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2021-11-25 20:10:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-25 20:10:30,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:10:30,309 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2021-11-25 20:10:30,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 20:10:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-25 20:10:30,525 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:10:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:10:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1223337597, now seen corresponding path program 18 times [2021-11-25 20:10:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:10:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257078549] [2021-11-25 20:10:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:10:30,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:10:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:10:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 1600 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:34,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:10:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257078549] [2021-11-25 20:10:34,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257078549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:10:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390608877] [2021-11-25 20:10:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:10:34,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:10:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:10:34,579 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:10:34,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 20:10:35,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:10:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:10:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 233 conjunts are in the unsatisfiable core [2021-11-25 20:10:35,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:10:35,188 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 20:10:35,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:10:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 1722 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:10:49,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 1764 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:03,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390608877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:03,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763299840] [2021-11-25 20:11:03,656 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:11:03,657 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:11:03,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:11:03,657 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:11:03,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:11:03,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,693 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 20:11:03,726 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 20:11:03,756 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 20:11:03,782 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 20:11:03,818 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 14 treesize of output 10 [2021-11-25 20:11:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:03,895 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:11:03,895 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 20:11:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:03,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:03,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:04,004 INFO L354 Elim1Store]: treesize reduction 94, result has 16.1 percent of original size [2021-11-25 20:11:04,005 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 20:11:04,055 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:11:04,055 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 20:11:04,113 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:08,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26622#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:11:08,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:11:08,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:11:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 87, 87] total 258 [2021-11-25 20:11:08,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875753792] [2021-11-25 20:11:08,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2021-11-25 20:11:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2021-11-25 20:11:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5969, Invalid=65053, Unknown=0, NotChecked=0, Total=71022 [2021-11-25 20:11:08,121 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 259 states, 258 states have (on average 2.4689922480620154) internal successors, (637), 259 states have internal predecessors, (637), 0 states have call successors, (0), 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 20:11:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:15,956 INFO L93 Difference]: Finished difference Result 218 states and 219 transitions. [2021-11-25 20:11:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-25 20:11:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 258 states have (on average 2.4689922480620154) internal successors, (637), 259 states have internal predecessors, (637), 0 states have call successors, (0), 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 213 [2021-11-25 20:11:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:15,959 INFO L225 Difference]: With dead ends: 218 [2021-11-25 20:11:15,959 INFO L226 Difference]: Without dead ends: 218 [2021-11-25 20:11:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 458 SyntacticMatches, 2 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28852 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=9931, Invalid=87101, Unknown=0, NotChecked=0, Total=97032 [2021-11-25 20:11:15,965 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 4442 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 4858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:15,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 4858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4442 Invalid, 0 Unknown, 410 Unchecked, 2.1s Time] [2021-11-25 20:11:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-25 20:11:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-11-25 20:11:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 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 20:11:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-11-25 20:11:15,972 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 213 [2021-11-25 20:11:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:15,972 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-11-25 20:11:15,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 258 states have (on average 2.4689922480620154) internal successors, (637), 259 states have internal predecessors, (637), 0 states have call successors, (0), 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 20:11:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-11-25 20:11:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-25 20:11:15,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:15,975 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1] [2021-11-25 20:11:16,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-25 20:11:16,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-25 20:11:16,191 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:11:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1652854768, now seen corresponding path program 19 times [2021-11-25 20:11:16,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903288041] [2021-11-25 20:11:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:16,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 2543 proven. 1888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:19,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903288041] [2021-11-25 20:11:19,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903288041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:11:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182338912] [2021-11-25 20:11:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:11:19,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:19,723 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:19,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-25 20:11:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 180 conjunts are in the unsatisfiable core [2021-11-25 20:11:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:20,271 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:11:20,271 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 20:11:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 2667 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:11:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 2625 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:35,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182338912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:11:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593632355] [2021-11-25 20:11:35,135 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:11:35,135 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:11:35,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:11:35,135 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:11:35,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:11:35,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:35,171 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 20:11:35,223 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 20:11:35,263 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 20:11:35,288 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 20:11:35,359 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 20:11:35,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:35,434 INFO L354 Elim1Store]: treesize reduction 60, result has 23.1 percent of original size [2021-11-25 20:11:35,434 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 20:11:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:35,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:11:35,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:35,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:11:35,547 INFO L354 Elim1Store]: treesize reduction 96, result has 15.8 percent of original size [2021-11-25 20:11:35,547 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 20:11:35,603 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:11:35,603 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 20:11:35,670 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:38,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28668#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.offset|) (or (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= |ULTIMATE.start_cstpcpy_~from#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstpcpy_~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|)) (and (<= 0 |ULTIMATE.start_cstpcpy_~to#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.offset|) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 1 |ULTIMATE.start_cstpcpy_~to#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstpcpy_#in~to#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstpcpy_~from#1.base|) (<= |ULTIMATE.start_cstpcpy_#in~from#1.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstpcpy_#in~to#1.offset|) (<= 1 |ULTIMATE.start_cstpcpy_~from#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstpcpy_#in~from#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_cstpcpy_~from#1.base|) |ULTIMATE.start_cstpcpy_~from#1.offset|) |ULTIMATE.start_cstpcpy_#t~mem4#1|) (<= (+ |ULTIMATE.start_cstpcpy_~from#1.offset| 1) (select |#length| |ULTIMATE.start_cstpcpy_~from#1.base|)) (< (select |#length| |ULTIMATE.start_cstpcpy_~to#1.base|) (+ |ULTIMATE.start_cstpcpy_~to#1.offset| 1)) (= (select |#valid| |ULTIMATE.start_cstpcpy_~from#1.base|) 1) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:11:38,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:11:38,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:11:38,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 90, 90] total 221 [2021-11-25 20:11:38,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660042589] [2021-11-25 20:11:38,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:11:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2021-11-25 20:11:38,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2021-11-25 20:11:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8899, Invalid=43313, Unknown=0, NotChecked=0, Total=52212 [2021-11-25 20:11:38,518 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 221 states, 221 states have (on average 2.3484162895927603) internal successors, (519), 221 states have internal predecessors, (519), 0 states have call successors, (0), 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 20:11:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:42,908 INFO L93 Difference]: Finished difference Result 348 states and 349 transitions. [2021-11-25 20:11:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-25 20:11:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 2.3484162895927603) internal successors, (519), 221 states have internal predecessors, (519), 0 states have call successors, (0), 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 216 [2021-11-25 20:11:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:42,910 INFO L225 Difference]: With dead ends: 348 [2021-11-25 20:11:42,910 INFO L226 Difference]: Without dead ends: 220 [2021-11-25 20:11:42,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 507 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20296 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=13895, Invalid=60361, Unknown=0, NotChecked=0, Total=74256 [2021-11-25 20:11:42,913 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 136 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:42,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:11:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-25 20:11:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-11-25 20:11:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 0 states have call successors, (0), 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 20:11:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-11-25 20:11:42,920 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2021-11-25 20:11:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:42,920 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-11-25 20:11:42,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 2.3484162895927603) internal successors, (519), 221 states have internal predecessors, (519), 0 states have call successors, (0), 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 20:11:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-11-25 20:11:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-25 20:11:42,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:42,923 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2021-11-25 20:11:42,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:43,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:43,131 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 20:11:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1808864386, now seen corresponding path program 20 times [2021-11-25 20:11:43,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:43,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010545694] [2021-11-25 20:11:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:43,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4516 backedges. 1681 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:11:47,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010545694] [2021-11-25 20:11:47,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010545694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:11:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541325830] [2021-11-25 20:11:47,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:11:47,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:47,170 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:47,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e43b720-88d8-4a9c-8eac-19cfa73daab5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process