./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V --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 6bc6b4117baccd9c0c047fce306a2f95fb55fa90595dfb64eaa429319b56a306 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:45:04,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:45:04,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:45:04,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:45:04,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:45:04,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:45:04,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:45:04,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:45:04,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:45:04,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:45:04,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:45:04,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:45:04,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:45:04,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:45:04,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:45:04,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:45:04,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:45:04,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:45:04,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:45:04,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:45:04,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:45:04,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:45:04,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:45:04,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:45:04,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:45:04,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:45:04,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:45:04,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:45:04,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:45:04,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:45:04,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:45:04,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:45:04,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:45:04,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:45:04,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:45:04,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:45:04,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:45:04,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:45:04,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:45:04,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:45:04,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:45:04,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:45:04,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:45:04,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:45:04,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:45:04,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:45:04,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:45:04,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:45:04,611 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:45:04,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:45:04,612 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:45:04,612 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:45:04,612 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:45:04,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:45:04,613 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:45:04,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:45:04,613 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:45:04,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:45:04,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:45:04,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:45:04,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:45:04,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:45:04,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:45:04,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:45:04,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:45:04,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:45:04,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:45:04,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:45:04,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:45:04,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:45:04,617 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:45:04,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:45:04,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:45:04,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:45:04,618 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:45:04,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:45:04,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:45:04,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:45:04,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:45:04,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:45:04,619 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:45:04,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:45:04,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:45:04,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:45:04,620 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_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bc6b4117baccd9c0c047fce306a2f95fb55fa90595dfb64eaa429319b56a306 [2021-11-23 03:45:04,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:45:04,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:45:04,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:45:04,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:45:04,914 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:45:04,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2021-11-23 03:45:05,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/data/51d29cca7/dfdbaa01ed01407c95b0b7ac5a0cd1e4/FLAG6899810de [2021-11-23 03:45:05,553 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:45:05,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2021-11-23 03:45:05,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/data/51d29cca7/dfdbaa01ed01407c95b0b7ac5a0cd1e4/FLAG6899810de [2021-11-23 03:45:05,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/data/51d29cca7/dfdbaa01ed01407c95b0b7ac5a0cd1e4 [2021-11-23 03:45:05,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:45:05,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:45:05,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:45:05,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:45:05,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:45:05,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:45:05" (1/1) ... [2021-11-23 03:45:05,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2f3cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:05, skipping insertion in model container [2021-11-23 03:45:05,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:45:05" (1/1) ... [2021-11-23 03:45:05,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:45:05,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:45:06,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:45:06,209 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:45:06,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:45:06,265 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:45:06,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06 WrapperNode [2021-11-23 03:45:06,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:45:06,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:45:06,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:45:06,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:45:06,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,338 INFO L137 Inliner]: procedures = 13, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 97 [2021-11-23 03:45:06,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:45:06,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:45:06,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:45:06,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:45:06,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:45:06,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:45:06,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:45:06,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:45:06,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (1/1) ... [2021-11-23 03:45:06,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:45:06,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:06,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:45:06,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:45:06,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:45:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:45:06,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:45:06,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:45:06,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:45:06,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:45:06,636 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:45:06,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:45:06,912 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:45:06,985 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:45:06,986 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-23 03:45:06,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:06 BoogieIcfgContainer [2021-11-23 03:45:06,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:45:06,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:45:06,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:45:07,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:45:07,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:45:05" (1/3) ... [2021-11-23 03:45:07,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518b131b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:45:07, skipping insertion in model container [2021-11-23 03:45:07,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:06" (2/3) ... [2021-11-23 03:45:07,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518b131b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:45:07, skipping insertion in model container [2021-11-23 03:45:07,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:06" (3/3) ... [2021-11-23 03:45:07,010 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers4-1.c [2021-11-23 03:45:07,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:45:07,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-11-23 03:45:07,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:45:07,095 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 [2021-11-23 03:45:07,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-11-23 03:45:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 2.466666666666667) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:45:07,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:07,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:45:07,123 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 143511, now seen corresponding path program 1 times [2021-11-23 03:45:07,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:07,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206671622] [2021-11-23 03:45:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:07,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:07,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:07,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206671622] [2021-11-23 03:45:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206671622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:07,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:07,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:45:07,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223477196] [2021-11-23 03:45:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:07,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:45:07,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:45:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:45:07,437 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 2.466666666666667) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-23 03:45:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:07,506 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-23 03:45:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:45:07,509 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 [2021-11-23 03:45:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:07,520 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:45:07,520 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:45:07,522 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 [2021-11-23 03:45:07,528 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:07,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:45:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 03:45:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 30 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) [2021-11-23 03:45:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 03:45:07,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 3 [2021-11-23 03:45:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:07,572 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 03:45:07,572 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) [2021-11-23 03:45:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 03:45:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:45:07,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:07,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:45:07,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:45:07,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash 143512, now seen corresponding path program 1 times [2021-11-23 03:45:07,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:07,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870343538] [2021-11-23 03:45:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:07,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:07,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:07,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870343538] [2021-11-23 03:45:07,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870343538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:07,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:07,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:45:07,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663880501] [2021-11-23 03:45:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:07,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:45:07,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:45:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:45:07,666 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:07,779 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-23 03:45:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:45:07,780 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 [2021-11-23 03:45:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:07,782 INFO L225 Difference]: With dead ends: 33 [2021-11-23 03:45:07,782 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 03:45:07,782 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 [2021-11-23 03:45:07,784 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:07,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 03:45:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 03:45:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 2.176470588235294) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 03:45:07,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 3 [2021-11-23 03:45:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:07,803 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 03:45:07,804 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) [2021-11-23 03:45:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 03:45:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:45:07,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:07,807 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-23 03:45:07,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:45:07,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 138020104, now seen corresponding path program 1 times [2021-11-23 03:45:07,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:07,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996420934] [2021-11-23 03:45:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:07,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:08,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:08,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996420934] [2021-11-23 03:45:08,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996420934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:08,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181318995] [2021-11-23 03:45:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:08,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:08,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:08,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:45:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:45:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:08,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:08,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181318995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:08,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932453344] [2021-11-23 03:45:08,498 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-23 03:45:08,502 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:08,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:08,517 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:08,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:08,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:09,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:09,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:09,327 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:09,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203#(and (<= 0 |ULTIMATE.start_getNumbers_~i~0#1|) (< (select |#length| |~#array~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers_~i~0#1|) |~#array~0.offset| 4)) (= |~#numbers3~0.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (= 2 |~#array~0.base|) (< |ULTIMATE.start_getNumbers_~i~0#1| 10) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:09,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:09,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:09,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2021-11-23 03:45:09,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776441662] [2021-11-23 03:45:09,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:09,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:45:09,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:45:09,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:45:09,514 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:09,784 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-11-23 03:45:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:45:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 03:45:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:09,791 INFO L225 Difference]: With dead ends: 93 [2021-11-23 03:45:09,792 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 03:45:09,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:45:09,797 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:09,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 73 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:45:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 03:45:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 39. [2021-11-23 03:45:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-23 03:45:09,813 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 5 [2021-11-23 03:45:09,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:09,813 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-23 03:45:09,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-23 03:45:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:45:09,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:09,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-11-23 03:45:09,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:10,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:10,043 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:10,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1476591955, now seen corresponding path program 1 times [2021-11-23 03:45:10,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:10,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60637316] [2021-11-23 03:45:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:10,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:45:10,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60637316] [2021-11-23 03:45:10,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60637316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:10,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640653483] [2021-11-23 03:45:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:10,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:10,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:10,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:45:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:10,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:45:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:10,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640653483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895749926] [2021-11-23 03:45:10,377 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-23 03:45:10,377 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:10,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:10,378 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:10,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:45:10,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:10,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:45:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:10,878 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:11,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '393#(and (= |ULTIMATE.start_getNumbers2_~i~1#1| 0) (= |ULTIMATE.start_getNumbers_#res#1.base| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= |~#numbers3~0.offset| 0) (< (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4)) (= |ULTIMATE.start_getNumbers_#res#1.offset| |~#array~0.offset|) (= |ULTIMATE.start_getNumbers_#res#1.base| |~#array~0.base|) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:11,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:11,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:11,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2021-11-23 03:45:11,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422739713] [2021-11-23 03:45:11,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:11,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:45:11,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:45:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:45:11,115 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-11-23 03:45:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:11,361 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-11-23 03:45:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:45:11,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 8 [2021-11-23 03:45:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:11,363 INFO L225 Difference]: With dead ends: 49 [2021-11-23 03:45:11,363 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 03:45:11,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:45:11,365 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:11,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 03:45:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-11-23 03:45:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-23 03:45:11,373 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 8 [2021-11-23 03:45:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:11,373 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-23 03:45:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-11-23 03:45:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-23 03:45:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:45:11,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:11,374 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-11-23 03:45:11,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:11,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:11,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:11,603 INFO L85 PathProgramCache]: Analyzing trace with hash 954817112, now seen corresponding path program 2 times [2021-11-23 03:45:11,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:11,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346734041] [2021-11-23 03:45:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:11,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:11,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346734041] [2021-11-23 03:45:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346734041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171843288] [2021-11-23 03:45:11,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:11,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:11,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:11,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:11,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:45:11,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:45:11,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:11,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:45:11,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:45:12,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:45:12,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171843288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:12,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:45:12,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2021-11-23 03:45:12,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606486170] [2021-11-23 03:45:12,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:12,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:45:12,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:45:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:45:12,093 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:12,168 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-23 03:45:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:45:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2021-11-23 03:45:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:12,173 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:45:12,173 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:45:12,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:45:12,175 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:12,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:45:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 03:45:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 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) [2021-11-23 03:45:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-23 03:45:12,191 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2021-11-23 03:45:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:12,192 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-23 03:45:12,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-23 03:45:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:45:12,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:12,193 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2021-11-23 03:45:12,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:12,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:12,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash -707793006, now seen corresponding path program 1 times [2021-11-23 03:45:12,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:12,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322381023] [2021-11-23 03:45:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 03:45:12,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:12,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322381023] [2021-11-23 03:45:12,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322381023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:12,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:12,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:45:12,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292323206] [2021-11-23 03:45:12,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:12,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:12,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:12,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:12,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:12,470 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-23 03:45:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:12,511 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-23 03:45:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 16 [2021-11-23 03:45:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:12,512 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:45:12,513 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:45:12,513 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 [2021-11-23 03:45:12,514 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:12,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:12,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:45:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-23 03:45:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 41 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) [2021-11-23 03:45:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-23 03:45:12,520 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 16 [2021-11-23 03:45:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:12,521 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-23 03:45:12,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-23 03:45:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-23 03:45:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:45:12,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:12,523 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-11-23 03:45:12,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:45:12,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash -466746703, now seen corresponding path program 1 times [2021-11-23 03:45:12,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:12,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899334733] [2021-11-23 03:45:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:45:12,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899334733] [2021-11-23 03:45:12,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899334733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:12,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:12,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:45:12,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66166871] [2021-11-23 03:45:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:12,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:45:12,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:45:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:45:12,634 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-11-23 03:45:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:12,669 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-23 03:45:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:45:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 17 [2021-11-23 03:45:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:12,670 INFO L225 Difference]: With dead ends: 41 [2021-11-23 03:45:12,671 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:45:12,671 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 [2021-11-23 03:45:12,672 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:12,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:45:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 03:45:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-23 03:45:12,677 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2021-11-23 03:45:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:12,678 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-23 03:45:12,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-11-23 03:45:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-23 03:45:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:45:12,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:12,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-11-23 03:45:12,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:45:12,680 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -466746702, now seen corresponding path program 1 times [2021-11-23 03:45:12,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:12,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771482521] [2021-11-23 03:45:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:12,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771482521] [2021-11-23 03:45:12,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771482521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317929479] [2021-11-23 03:45:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:12,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:12,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:12,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:45:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:45:12,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:12,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:12,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317929479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:12,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765269675] [2021-11-23 03:45:12,985 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:45:12,986 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:12,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:12,986 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:12,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:13,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:13,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:13,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:13,509 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:13,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '915#(and (< (select |#length| |~#numbers2~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) 4 |~#numbers2~0.offset|)) (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (= |ULTIMATE.start_getNumbers2_~i~1#1| 0) (<= (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (= |ULTIMATE.start_getNumbers_#res#1.base| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= |~#numbers3~0.offset| 0) (= |ULTIMATE.start_getNumbers_#res#1.offset| |~#array~0.offset|) (= |ULTIMATE.start_getNumbers_#res#1.base| |~#array~0.base|) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:13,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:13,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:13,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2021-11-23 03:45:13,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693154496] [2021-11-23 03:45:13,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:13,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:45:13,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:45:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:45:13,870 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:13,945 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-11-23 03:45:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:45:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:45:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:13,946 INFO L225 Difference]: With dead ends: 49 [2021-11-23 03:45:13,946 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 03:45:13,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:45:13,947 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:13,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 03:45:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-23 03:45:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 48 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) [2021-11-23 03:45:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-11-23 03:45:13,952 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 17 [2021-11-23 03:45:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:13,952 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-11-23 03:45:13,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-11-23 03:45:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:45:13,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:13,953 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2021-11-23 03:45:13,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:14,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:45:14,154 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2056709006, now seen corresponding path program 2 times [2021-11-23 03:45:14,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:14,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824438596] [2021-11-23 03:45:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:14,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:14,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:14,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824438596] [2021-11-23 03:45:14,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824438596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:14,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:14,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:45:14,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741383230] [2021-11-23 03:45:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:14,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:14,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:14,280 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-11-23 03:45:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:14,327 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-23 03:45:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 25 [2021-11-23 03:45:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:14,329 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:45:14,329 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 03:45:14,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:14,333 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:14,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 03:45:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 03:45:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:14,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-23 03:45:14,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 25 [2021-11-23 03:45:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:14,348 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-23 03:45:14,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-11-23 03:45:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-23 03:45:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:45:14,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:14,350 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2021-11-23 03:45:14,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:45:14,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash -812313107, now seen corresponding path program 1 times [2021-11-23 03:45:14,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:14,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230689681] [2021-11-23 03:45:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:14,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:14,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230689681] [2021-11-23 03:45:14,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230689681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086967305] [2021-11-23 03:45:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:14,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:14,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:14,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:14,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:45:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:45:14,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:15,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:15,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086967305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352054288] [2021-11-23 03:45:15,279 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:45:15,279 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:15,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:15,280 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:15,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:15,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:15,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:15,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:15,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,828 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-11-23 03:45:15,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 157 [2021-11-23 03:45:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:16,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:16,052 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:16,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1299#(and (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= |~#numbers3~0.offset| 0) (< (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4)) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:16,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:16,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:16,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 3, 3] total 19 [2021-11-23 03:45:16,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667490375] [2021-11-23 03:45:16,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:45:16,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:45:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:45:16,923 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:17,522 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-11-23 03:45:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:45:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 03:45:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:17,524 INFO L225 Difference]: With dead ends: 100 [2021-11-23 03:45:17,524 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 03:45:17,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 03:45:17,527 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 584 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:17,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 54 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:45:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 03:45:17,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2021-11-23 03:45:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-11-23 03:45:17,549 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2021-11-23 03:45:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-11-23 03:45:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-11-23 03:45:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:45:17,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:17,553 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2021-11-23 03:45:17,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:17,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:17,754 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash 588097432, now seen corresponding path program 1 times [2021-11-23 03:45:17,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:17,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474154351] [2021-11-23 03:45:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:17,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:17,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474154351] [2021-11-23 03:45:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474154351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549157384] [2021-11-23 03:45:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:17,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:17,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:17,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:45:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:17,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:45:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:18,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:18,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549157384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:18,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084367809] [2021-11-23 03:45:18,417 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:45:18,417 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:18,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:18,418 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:18,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:18,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:18,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:18,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:19,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:19,087 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:19,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1664#(and (< (select |#length| |~#numbers2~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) 4 |~#numbers2~0.offset|)) (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:19,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:19,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:19,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-11-23 03:45:19,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259789697] [2021-11-23 03:45:19,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:19,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:45:19,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:45:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:45:19,808 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-23 03:45:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:20,075 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-11-23 03:45:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:45:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 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 28 [2021-11-23 03:45:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:20,077 INFO L225 Difference]: With dead ends: 59 [2021-11-23 03:45:20,077 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 03:45:20,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:45:20,078 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:20,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 60 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 03:45:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 03:45:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-23 03:45:20,082 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2021-11-23 03:45:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:20,082 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-23 03:45:20,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-23 03:45:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-23 03:45:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 03:45:20,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:20,084 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 4, 1, 1, 1] [2021-11-23 03:45:20,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:20,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:20,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 900198739, now seen corresponding path program 2 times [2021-11-23 03:45:20,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:20,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57279492] [2021-11-23 03:45:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:20,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 90 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:20,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57279492] [2021-11-23 03:45:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57279492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181525847] [2021-11-23 03:45:20,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:20,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:20,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:20,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:45:20,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:45:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 03:45:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 03:45:21,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:45:21,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181525847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:21,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:45:21,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 21 [2021-11-23 03:45:21,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417701969] [2021-11-23 03:45:21,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:21,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:45:21,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:45:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:45:21,042 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-23 03:45:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:21,160 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-11-23 03:45:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:45:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 36 [2021-11-23 03:45:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:21,162 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:45:21,162 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 03:45:21,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:45:21,163 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 23 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 [2021-11-23 03:45:21,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 23 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 03:45:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-23 03:45:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-23 03:45:21,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 36 [2021-11-23 03:45:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:21,167 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-23 03:45:21,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-23 03:45:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-23 03:45:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:45:21,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:21,168 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:45:21,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:21,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:45:21,369 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2136453907, now seen corresponding path program 1 times [2021-11-23 03:45:21,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:21,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401872178] [2021-11-23 03:45:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:21,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 03:45:21,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401872178] [2021-11-23 03:45:21,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401872178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:21,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:21,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:45:21,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700271393] [2021-11-23 03:45:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:21,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:21,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:21,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:21,428 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:21,466 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-11-23 03:45:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 37 [2021-11-23 03:45:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:21,468 INFO L225 Difference]: With dead ends: 57 [2021-11-23 03:45:21,469 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 03:45:21,469 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 [2021-11-23 03:45:21,475 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:21,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 03:45:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 03:45:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-11-23 03:45:21,480 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 37 [2021-11-23 03:45:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-11-23 03:45:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-11-23 03:45:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:45:21,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:21,486 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:45:21,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:45:21,486 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2136453908, now seen corresponding path program 1 times [2021-11-23 03:45:21,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:21,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576412224] [2021-11-23 03:45:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:21,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:21,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576412224] [2021-11-23 03:45:21,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576412224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084504627] [2021-11-23 03:45:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:21,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:21,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:21,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:45:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:21,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:45:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:21,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:21,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084504627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:21,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881606340] [2021-11-23 03:45:21,862 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:45:21,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:21,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:21,863 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:21,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:21,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:21,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:45:22,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:45:22,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:22,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,370 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-11-23 03:45:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 157 [2021-11-23 03:45:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:22,646 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1881606340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:23,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 7] total 19 [2021-11-23 03:45:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675694127] [2021-11-23 03:45:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:23,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:45:23,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:45:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:45:23,411 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:23,784 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-23 03:45:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:45:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 37 [2021-11-23 03:45:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:23,786 INFO L225 Difference]: With dead ends: 62 [2021-11-23 03:45:23,786 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 03:45:23,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:45:23,787 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 55 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:23,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 8 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:45:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 03:45:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-11-23 03:45:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.3125) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-23 03:45:23,790 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 37 [2021-11-23 03:45:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:23,791 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-23 03:45:23,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-23 03:45:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:45:23,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:23,792 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2021-11-23 03:45:23,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:24,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2136357106, now seen corresponding path program 2 times [2021-11-23 03:45:24,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602635578] [2021-11-23 03:45:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:24,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 03:45:24,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:24,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602635578] [2021-11-23 03:45:24,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602635578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:24,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453854723] [2021-11-23 03:45:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:24,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:24,151 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:24,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:45:24,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 03:45:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:45:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 03:45:24,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 03:45:25,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453854723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:25,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21198684] [2021-11-23 03:45:25,423 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 03:45:25,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:25,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:25,424 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:25,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:25,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:45:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:45:25,762 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 18 treesize of output 14 [2021-11-23 03:45:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:25,910 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-11-23 03:45:25,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 157 [2021-11-23 03:45:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:26,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:26,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:26,100 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:26,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2758#(and (< (select |#length| |~#numbers2~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) 4 |~#numbers2~0.offset|)) (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:26,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:26,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:26,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2021-11-23 03:45:26,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733979158] [2021-11-23 03:45:26,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:26,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:45:26,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:45:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:45:26,821 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2021-11-23 03:45:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:26,962 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-11-23 03:45:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:45:26,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 37 [2021-11-23 03:45:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:26,963 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:45:26,964 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 03:45:26,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:45:26,965 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:26,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 27 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 03:45:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-11-23 03:45:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-23 03:45:26,968 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 37 [2021-11-23 03:45:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:26,969 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-23 03:45:26,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2021-11-23 03:45:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-23 03:45:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 03:45:26,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:26,970 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:26,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:27,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:27,176 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1805561703, now seen corresponding path program 1 times [2021-11-23 03:45:27,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:27,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546657527] [2021-11-23 03:45:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:27,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 03:45:27,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:27,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546657527] [2021-11-23 03:45:27,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546657527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:27,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:27,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:45:27,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442577308] [2021-11-23 03:45:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:27,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:45:27,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:45:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:45:27,233 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-23 03:45:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:27,256 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-11-23 03:45:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:45:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 38 [2021-11-23 03:45:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:27,257 INFO L225 Difference]: With dead ends: 55 [2021-11-23 03:45:27,257 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 03:45:27,258 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 [2021-11-23 03:45:27,259 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:27,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 03:45:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-23 03:45:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-11-23 03:45:27,262 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 38 [2021-11-23 03:45:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:27,263 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-11-23 03:45:27,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-23 03:45:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-11-23 03:45:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 03:45:27,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:27,264 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:27,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:45:27,264 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1805561704, now seen corresponding path program 1 times [2021-11-23 03:45:27,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147990974] [2021-11-23 03:45:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:27,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:27,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:27,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147990974] [2021-11-23 03:45:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147990974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:27,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374048350] [2021-11-23 03:45:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:27,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:27,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:27,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:27,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:45:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:45:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:27,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 03:45:27,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374048350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611548690] [2021-11-23 03:45:27,578 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:45:27,578 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:27,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:27,579 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:27,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:27,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:27,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:28,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:28,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:28,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:28,228 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:29,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3234#(and (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (= |ULTIMATE.start_getNumbers3_~i~2#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|)) |ULTIMATE.start_getNumbers3_#t~mem6#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= (select (select |#memory_int| |~#numbers2~0.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) (- 4) |~#numbers2~0.offset|)) (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) (- 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|))) (= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (= |ULTIMATE.start_getNumbers2_#res#1.base| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (< (select |#length| |~#numbers3~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) 4 |~#numbers3~0.offset|)) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (= |ULTIMATE.start_getNumbers2_#res#1.base| |~#numbers2~0.base|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (= |ULTIMATE.start_getNumbers2_#res#1.offset| |~#numbers2~0.offset|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= (+ (* 4 |ULTIMATE.start_getNumbers2_~i~1#1|) |~#numbers2~0.offset|) (select |#length| |~#numbers2~0.base|)) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) 1))' at error location [2021-11-23 03:45:29,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:29,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:29,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-23 03:45:29,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163140809] [2021-11-23 03:45:29,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:29,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:45:29,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:45:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:45:29,342 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:29,413 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-11-23 03:45:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:45:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-11-23 03:45:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:29,414 INFO L225 Difference]: With dead ends: 73 [2021-11-23 03:45:29,414 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 03:45:29,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:45:29,415 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:29,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 90 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 03:45:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-23 03:45:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.203125) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-11-23 03:45:29,419 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 38 [2021-11-23 03:45:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:29,419 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-11-23 03:45:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-11-23 03:45:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 03:45:29,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:29,421 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:29,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 03:45:29,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:45:29,631 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2006320296, now seen corresponding path program 2 times [2021-11-23 03:45:29,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997696680] [2021-11-23 03:45:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:29,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997696680] [2021-11-23 03:45:29,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997696680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:29,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:29,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:45:29,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601287420] [2021-11-23 03:45:29,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:29,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:29,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:29,785 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:29,821 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-11-23 03:45:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:29,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 03:45:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:29,823 INFO L225 Difference]: With dead ends: 74 [2021-11-23 03:45:29,823 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 03:45:29,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:29,824 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:29,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 03:45:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 03:45:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-11-23 03:45:29,830 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 56 [2021-11-23 03:45:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:29,831 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-11-23 03:45:29,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-11-23 03:45:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 03:45:29,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:29,833 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:29,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 03:45:29,834 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash -366450199, now seen corresponding path program 1 times [2021-11-23 03:45:29,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:29,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908174177] [2021-11-23 03:45:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:29,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:29,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:29,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908174177] [2021-11-23 03:45:29,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908174177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:29,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799784154] [2021-11-23 03:45:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:29,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:29,965 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:29,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:45:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:45:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:30,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:30,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799784154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:30,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239211479] [2021-11-23 03:45:30,916 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:45:30,916 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:30,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:30,916 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:30,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:30,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:45:31,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:45:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:31,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:45:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,798 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:45:31,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:45:31,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:31,935 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:33,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3893#(and (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (< (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4)) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:33,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:33,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:33,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-11-23 03:45:33,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214015705] [2021-11-23 03:45:33,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:33,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:45:33,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:45:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:45:33,118 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-11-23 03:45:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:33,310 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-11-23 03:45:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:45:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 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 58 [2021-11-23 03:45:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:33,311 INFO L225 Difference]: With dead ends: 110 [2021-11-23 03:45:33,312 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 03:45:33,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:45:33,312 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 175 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:33,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 56 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 03:45:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2021-11-23 03:45:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-11-23 03:45:33,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 58 [2021-11-23 03:45:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:33,317 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-11-23 03:45:33,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-11-23 03:45:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-11-23 03:45:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 03:45:33,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:33,318 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:45:33,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:33,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:33,519 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1524945715, now seen corresponding path program 1 times [2021-11-23 03:45:33,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:33,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581478242] [2021-11-23 03:45:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:33,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:33,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581478242] [2021-11-23 03:45:33,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581478242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914037612] [2021-11-23 03:45:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:33,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:33,699 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:33,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:45:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:45:33,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:34,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914037612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578008385] [2021-11-23 03:45:34,556 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:45:34,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:34,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:34,557 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:34,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:34,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:34,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:45:34,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:45:34,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:34,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:35,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 03:45:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,369 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:45:35,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 271 [2021-11-23 03:45:35,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:35,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:35,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:36,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4461#(and (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|)) |ULTIMATE.start_getNumbers3_#t~mem6#1|) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|)) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (< (select |#length| |~#numbers3~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) 4 |~#numbers3~0.offset|)) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) 1))' at error location [2021-11-23 03:45:36,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:36,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:36,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-11-23 03:45:36,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825635244] [2021-11-23 03:45:36,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:36,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:45:36,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:45:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:45:36,772 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-11-23 03:45:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:36,998 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-11-23 03:45:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:45:36,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 03:45:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:36,999 INFO L225 Difference]: With dead ends: 83 [2021-11-23 03:45:36,999 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 03:45:37,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:45:37,000 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:37,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 03:45:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-23 03:45:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 82 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-23 03:45:37,005 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 59 [2021-11-23 03:45:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-23 03:45:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-11-23 03:45:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-23 03:45:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:45:37,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:37,006 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2021-11-23 03:45:37,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:37,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:37,207 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash -306551404, now seen corresponding path program 2 times [2021-11-23 03:45:37,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:37,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249128908] [2021-11-23 03:45:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:37,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:37,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:37,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249128908] [2021-11-23 03:45:37,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249128908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:37,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501026987] [2021-11-23 03:45:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:37,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:37,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:37,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:37,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:45:37,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:45:37,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:45:37,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-23 03:45:38,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-23 03:45:39,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501026987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:39,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458690436] [2021-11-23 03:45:39,295 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:45:39,296 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:39,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:39,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:39,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:39,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:39,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:39,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:39,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:39,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:39,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 03:45:40,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:40,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:40,066 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:45:40,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 271 [2021-11-23 03:45:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:40,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:40,213 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:41,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5059#(and (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (< (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4)) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:41,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:41,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:41,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2021-11-23 03:45:41,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138446693] [2021-11-23 03:45:41,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:41,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:45:41,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:45:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:45:41,426 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:41,783 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-11-23 03:45:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:45:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-23 03:45:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:41,786 INFO L225 Difference]: With dead ends: 82 [2021-11-23 03:45:41,786 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 03:45:41,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 03:45:41,787 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 153 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:41,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 40 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 03:45:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-23 03:45:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 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) [2021-11-23 03:45:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-23 03:45:41,791 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 67 [2021-11-23 03:45:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:41,791 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-23 03:45:41,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-23 03:45:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:45:41,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:41,793 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1] [2021-11-23 03:45:41,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:42,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 03:45:42,007 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -913158936, now seen corresponding path program 2 times [2021-11-23 03:45:42,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:42,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015902473] [2021-11-23 03:45:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:42,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-23 03:45:42,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015902473] [2021-11-23 03:45:42,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015902473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:42,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463405993] [2021-11-23 03:45:42,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:45:42,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:42,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:42,240 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:45:42,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 03:45:42,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:45:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:45:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-23 03:45:43,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-23 03:45:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463405993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:44,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1450278890] [2021-11-23 03:45:44,067 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 03:45:44,067 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:44,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:44,068 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:44,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:44,329 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 18 treesize of output 14 [2021-11-23 03:45:44,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:44,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 03:45:44,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,822 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:45:44,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 271 [2021-11-23 03:45:44,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:44,902 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 25 treesize of output 25 [2021-11-23 03:45:44,938 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:46,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5666#(and (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (< |ULTIMATE.start_getNumbers3_~i~2#1| 10) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (+ (* |ULTIMATE.start_getNumbers3_~i~2#1| 4) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|)) |ULTIMATE.start_getNumbers3_#t~mem6#1|) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|)) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (< (select |#length| |~#numbers3~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers3_~i~2#1|) 4 |~#numbers3~0.offset|)) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_~i~2#1|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) 1))' at error location [2021-11-23 03:45:46,322 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:46,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:46,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2021-11-23 03:45:46,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204271336] [2021-11-23 03:45:46,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:46,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:45:46,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:45:46,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:45:46,325 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-11-23 03:45:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:46,526 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-11-23 03:45:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:45:46,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 03:45:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:46,527 INFO L225 Difference]: With dead ends: 81 [2021-11-23 03:45:46,527 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 03:45:46,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:45:46,529 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:46,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 30 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 03:45:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-11-23 03:45:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-23 03:45:46,532 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 68 [2021-11-23 03:45:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:46,533 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-23 03:45:46,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2021-11-23 03:45:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-23 03:45:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:45:46,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:46,535 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:46,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:46,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 03:45:46,747 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash -913078472, now seen corresponding path program 1 times [2021-11-23 03:45:46,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:46,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348483231] [2021-11-23 03:45:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:46,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-23 03:45:46,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348483231] [2021-11-23 03:45:46,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348483231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:46,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:46,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:45:46,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481275000] [2021-11-23 03:45:46,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:46,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:46,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:46,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:46,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:46,802 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2021-11-23 03:45:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:46,834 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-11-23 03:45:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) Word has length 68 [2021-11-23 03:45:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:46,836 INFO L225 Difference]: With dead ends: 78 [2021-11-23 03:45:46,836 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 03:45:46,837 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 [2021-11-23 03:45:46,838 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:46,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 03:45:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-23 03:45:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 77 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) [2021-11-23 03:45:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-23 03:45:46,842 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 68 [2021-11-23 03:45:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:46,842 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-23 03:45:46,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2021-11-23 03:45:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-23 03:45:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:45:46,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:46,844 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:46,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 03:45:46,844 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -913078471, now seen corresponding path program 1 times [2021-11-23 03:45:46,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:46,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590615350] [2021-11-23 03:45:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:46,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:46,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590615350] [2021-11-23 03:45:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590615350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772270542] [2021-11-23 03:45:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:46,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:46,923 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:46,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:45:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:45:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:47,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 03:45:47,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772270542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041759359] [2021-11-23 03:45:47,301 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:45:47,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:47,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:47,302 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:47,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:47,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:47,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:47,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:47,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:45:48,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,191 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:45:48,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:45:48,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:48,348 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:49,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6420#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (= |ULTIMATE.start_getNumbers3_#res#1.base| |~#numbers3~0.base|) (< (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4)) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (= |ULTIMATE.start_getNumbers3_#res#1.base| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (= |ULTIMATE.start_getNumbers4_~i~3#1| 0) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (= |ULTIMATE.start_getNumbers3_#res#1.offset| |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= |ULTIMATE.start_getNumbers3_#res#1.offset| |~#numbers3~0.offset|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:49,498 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:49,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:49,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-23 03:45:49,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850855544] [2021-11-23 03:45:49,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:49,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:45:49,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:45:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:45:49,500 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-23 03:45:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:49,567 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-11-23 03:45:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:45:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) Word has length 68 [2021-11-23 03:45:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:49,569 INFO L225 Difference]: With dead ends: 96 [2021-11-23 03:45:49,569 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:45:49,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:45:49,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:49,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:45:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-23 03:45:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 95 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) [2021-11-23 03:45:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-23 03:45:49,575 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 68 [2021-11-23 03:45:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:49,576 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-23 03:45:49,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-23 03:45:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-23 03:45:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:45:49,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:49,577 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:49,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:49,783 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -352092263, now seen corresponding path program 2 times [2021-11-23 03:45:49,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:49,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998338793] [2021-11-23 03:45:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:49,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:49,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998338793] [2021-11-23 03:45:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998338793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:49,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:49,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:45:49,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075730971] [2021-11-23 03:45:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:49,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:49,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:49,936 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:49,995 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-11-23 03:45:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-23 03:45:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:49,997 INFO L225 Difference]: With dead ends: 101 [2021-11-23 03:45:49,997 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 03:45:49,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:45:49,998 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:49,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 03:45:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-11-23 03:45:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.108695652173913) internal successors, (102), 97 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) [2021-11-23 03:45:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-23 03:45:50,010 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 86 [2021-11-23 03:45:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:50,011 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-23 03:45:50,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-23 03:45:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 03:45:50,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:50,013 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:50,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 03:45:50,013 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1970041753, now seen corresponding path program 1 times [2021-11-23 03:45:50,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:50,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625032232] [2021-11-23 03:45:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:50,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:50,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625032232] [2021-11-23 03:45:50,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625032232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:50,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:50,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:45:50,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519186169] [2021-11-23 03:45:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:50,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:45:50,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:45:50,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:45:50,126 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:50,153 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-11-23 03:45:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:45:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 03:45:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:50,155 INFO L225 Difference]: With dead ends: 97 [2021-11-23 03:45:50,155 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 03:45:50,155 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 [2021-11-23 03:45:50,156 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:50,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 03:45:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-23 03:45:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-11-23 03:45:50,161 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 87 [2021-11-23 03:45:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:50,161 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-11-23 03:45:50,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-11-23 03:45:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 03:45:50,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:50,163 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:50,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 03:45:50,163 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1970041754, now seen corresponding path program 1 times [2021-11-23 03:45:50,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260062772] [2021-11-23 03:45:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:50,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:50,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:50,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260062772] [2021-11-23 03:45:50,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260062772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:50,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:50,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:45:50,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295387967] [2021-11-23 03:45:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:50,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:45:50,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:45:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:50,291 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:50,327 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-11-23 03:45:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:45:50,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 03:45:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:50,329 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:45:50,329 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 03:45:50,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:45:50,330 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:50,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:50,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 03:45:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-23 03:45:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.096774193548387) internal successors, (102), 97 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) [2021-11-23 03:45:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-23 03:45:50,335 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 87 [2021-11-23 03:45:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:50,335 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-23 03:45:50,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-23 03:45:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 03:45:50,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:50,337 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:50,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 03:45:50,337 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash -870413021, now seen corresponding path program 1 times [2021-11-23 03:45:50,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246051150] [2021-11-23 03:45:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:50,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:50,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246051150] [2021-11-23 03:45:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246051150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:50,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379116492] [2021-11-23 03:45:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:50,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:50,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:50,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 03:45:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:45:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:51,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:51,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379116492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:51,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043525468] [2021-11-23 03:45:51,848 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:45:51,848 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:51,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:51,849 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:51,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:51,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:51,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:45:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:45:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:52,229 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 18 treesize of output 14 [2021-11-23 03:45:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-23 03:45:52,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,440 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:45:52,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 226 treesize of output 225 [2021-11-23 03:45:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:52,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 03:45:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,853 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:45:52,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 271 [2021-11-23 03:45:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:45:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:53,387 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:56,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7763#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 4) (<= 0 |ULTIMATE.start_getNumbers4_~i~3#1|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 4) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (< (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4)) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 4 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 4 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:56,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:56,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:56,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-11-23 03:45:56,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802590830] [2021-11-23 03:45:56,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:56,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:45:56,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:45:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:45:56,145 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2021-11-23 03:45:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:56,363 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2021-11-23 03:45:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:45:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 03:45:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:56,365 INFO L225 Difference]: With dead ends: 120 [2021-11-23 03:45:56,365 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 03:45:56,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:45:56,366 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 67 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:56,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 36 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:45:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 03:45:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2021-11-23 03:45:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 105 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-11-23 03:45:56,370 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 89 [2021-11-23 03:45:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:56,371 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-11-23 03:45:56,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2021-11-23 03:45:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-11-23 03:45:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 03:45:56,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:56,372 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:56,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:56,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 03:45:56,575 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:45:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1212999856, now seen corresponding path program 1 times [2021-11-23 03:45:56,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793467449] [2021-11-23 03:45:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:56,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:56,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793467449] [2021-11-23 03:45:56,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793467449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3628716] [2021-11-23 03:45:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:56,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:56,716 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:56,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 03:45:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:45:56,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:45:58,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3628716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:58,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780938914] [2021-11-23 03:45:58,019 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:45:58,020 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:58,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:58,020 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:58,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:58,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:45:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:45:58,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:45:58,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:45:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 03:45:58,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,451 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:45:58,452 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 3 case distinctions, treesize of input 216 treesize of output 221 [2021-11-23 03:45:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:58,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:58,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:45:58,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:58,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,851 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:45:58,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:45:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:59,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:45:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:59,124 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-11-23 03:45:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 157 [2021-11-23 03:45:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:59,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:59,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:45:59,370 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:01,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8554#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 4) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 4) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 4 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (< (select |#length| |~#numbers4~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |~#numbers4~0.offset| 4)) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 4 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (<= (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|)) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |ULTIMATE.start_getNumbers4_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)))) (= |~#numbers2~0.base| 3) (<= 0 (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= (select |#valid| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:01,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:01,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:01,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-11-23 03:46:01,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156759262] [2021-11-23 03:46:01,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:01,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:46:01,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:46:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:46:01,699 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:01,881 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-11-23 03:46:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:46:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-23 03:46:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:01,883 INFO L225 Difference]: With dead ends: 107 [2021-11-23 03:46:01,883 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 03:46:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:46:01,885 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:01,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 03:46:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-23 03:46:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.088235294117647) internal successors, (111), 106 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-11-23 03:46:01,889 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 90 [2021-11-23 03:46:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:01,890 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-11-23 03:46:01,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-11-23 03:46:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 03:46:01,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:01,891 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-23 03:46:01,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 03:46:02,103 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash -992024807, now seen corresponding path program 2 times [2021-11-23 03:46:02,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040401206] [2021-11-23 03:46:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:02,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:02,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040401206] [2021-11-23 03:46:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040401206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561059215] [2021-11-23 03:46:02,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:02,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:02,447 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:02,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 03:46:02,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:46:02,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:02,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 03:46:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-11-23 03:46:03,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:46:03,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561059215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:03,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:46:03,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2021-11-23 03:46:03,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035350203] [2021-11-23 03:46:03,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:03,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:46:03,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:46:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:46:03,371 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-11-23 03:46:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:03,482 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-11-23 03:46:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:46:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) Word has length 98 [2021-11-23 03:46:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:03,484 INFO L225 Difference]: With dead ends: 106 [2021-11-23 03:46:03,484 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 03:46:03,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:46:03,485 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:03,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 03:46:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-23 03:46:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 105 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) [2021-11-23 03:46:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-11-23 03:46:03,493 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 98 [2021-11-23 03:46:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:03,494 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-11-23 03:46:03,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-11-23 03:46:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-11-23 03:46:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:46:03,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:03,496 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:03,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:03,710 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash -687937643, now seen corresponding path program 1 times [2021-11-23 03:46:03,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934796598] [2021-11-23 03:46:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:03,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-23 03:46:03,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:03,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934796598] [2021-11-23 03:46:03,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934796598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:03,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:03,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:46:03,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542829666] [2021-11-23 03:46:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:03,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:46:03,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:46:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:46:03,770 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2021-11-23 03:46:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:03,806 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-11-23 03:46:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:46:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) Word has length 99 [2021-11-23 03:46:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:03,808 INFO L225 Difference]: With dead ends: 105 [2021-11-23 03:46:03,808 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 03:46:03,809 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 [2021-11-23 03:46:03,809 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:03,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 03:46:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-23 03:46:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 104 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-11-23 03:46:03,814 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2021-11-23 03:46:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:03,814 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-11-23 03:46:03,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2021-11-23 03:46:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-11-23 03:46:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:46:03,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:03,816 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 03:46:03,816 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash -687937642, now seen corresponding path program 1 times [2021-11-23 03:46:03,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:03,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601175611] [2021-11-23 03:46:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:03,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:03,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:03,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601175611] [2021-11-23 03:46:03,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601175611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094567246] [2021-11-23 03:46:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:03,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:03,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:03,902 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:03,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 03:46:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:04,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:46:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:04,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:04,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094567246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190482961] [2021-11-23 03:46:04,362 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:46:04,362 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:04,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:04,363 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:04,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:04,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:46:04,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:46:04,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:46:04,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-23 03:46:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,869 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:46:04,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 226 treesize of output 225 [2021-11-23 03:46:04,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:04,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:04,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:05,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:46:05,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,217 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:46:05,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:46:05,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:46:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:05,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:05,781 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [190482961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:08,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 7, 7] total 25 [2021-11-23 03:46:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836007280] [2021-11-23 03:46:08,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:08,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:46:08,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:46:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:46:08,320 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-23 03:46:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:11,802 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-11-23 03:46:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:46:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 99 [2021-11-23 03:46:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:11,803 INFO L225 Difference]: With dead ends: 107 [2021-11-23 03:46:11,803 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 03:46:11,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 03:46:11,805 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:11,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:46:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 03:46:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-23 03:46:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 104 states have (on average 1.0673076923076923) internal successors, (111), 106 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-11-23 03:46:11,809 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 99 [2021-11-23 03:46:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:11,810 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-11-23 03:46:11,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-11-23 03:46:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-11-23 03:46:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:46:11,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:11,811 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1, 1] [2021-11-23 03:46:11,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:12,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 03:46:12,027 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -687997926, now seen corresponding path program 2 times [2021-11-23 03:46:12,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299828873] [2021-11-23 03:46:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:12,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:12,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:12,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299828873] [2021-11-23 03:46:12,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299828873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:12,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460513514] [2021-11-23 03:46:12,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:12,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:12,263 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:12,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 03:46:12,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 03:46:12,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:46:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-11-23 03:46:13,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-11-23 03:46:14,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460513514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374160539] [2021-11-23 03:46:14,632 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:46:14,633 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:14,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:14,633 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:14,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:14,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:46:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:46:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:46:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:14,938 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 18 treesize of output 14 [2021-11-23 03:46:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-23 03:46:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,105 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:46:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 226 treesize of output 225 [2021-11-23 03:46:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,179 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 25 treesize of output 25 [2021-11-23 03:46:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,219 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 25 treesize of output 25 [2021-11-23 03:46:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:46:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,527 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:46:15,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:46:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:46:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:15,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:15,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:16,001 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:18,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10977#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 4) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 4) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#numbers3~0.offset| 0) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 4 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (< (select |#length| |~#numbers4~0.base|) (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |~#numbers4~0.offset| 4)) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 4 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (<= (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|)) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (= |ULTIMATE.start_getNumbers4_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (+ |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| (* |ULTIMATE.start_getNumbers4_~i~3#1| 4)))) (= |~#numbers2~0.base| 3) (<= 0 (+ (* 4 |ULTIMATE.start_getNumbers4_~i~3#1|) |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= (select |#valid| |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:46:18,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:18,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2021-11-23 03:46:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282652826] [2021-11-23 03:46:18,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:46:18,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:46:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:46:18,558 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 16 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:18,918 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-11-23 03:46:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:46:18,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 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 99 [2021-11-23 03:46:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:18,919 INFO L225 Difference]: With dead ends: 111 [2021-11-23 03:46:18,919 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 03:46:18,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 03:46:18,921 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:18,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 38 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 03:46:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-11-23 03:46:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-23 03:46:18,924 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 99 [2021-11-23 03:46:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:18,925 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-23 03:46:18,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-23 03:46:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 03:46:18,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:18,926 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:18,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:19,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:19,127 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash -294052435, now seen corresponding path program 1 times [2021-11-23 03:46:19,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:19,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851686295] [2021-11-23 03:46:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:19,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 03:46:19,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851686295] [2021-11-23 03:46:19,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851686295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952122327] [2021-11-23 03:46:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:19,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:19,227 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 03:46:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:46:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 03:46:19,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 03:46:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952122327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:19,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533609722] [2021-11-23 03:46:19,686 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:46:19,686 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:19,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:19,687 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:19,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:19,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:46:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 72 [2021-11-23 03:46:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:19,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 318 [2021-11-23 03:46:20,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:20,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-23 03:46:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,229 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:46:20,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 226 treesize of output 225 [2021-11-23 03:46:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 03:46:20,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:20,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,634 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:46:20,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 271 [2021-11-23 03:46:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:20,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:20,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:46:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:21,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:21,379 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:24,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11877#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 4) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 4) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= |ULTIMATE.start_main_~numbers~3#1.base| 5) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= |ULTIMATE.start_main_~numbers~3#1.offset| 0) (<= 5 |ULTIMATE.start_main_~numbers~3#1.base|) (= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_#res#1.offset|) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 5 |ULTIMATE.start_getNumbers4_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 10 |ULTIMATE.start_getNumbers4_~i~3#1|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 4 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= |ULTIMATE.start_getNumbers4_#res#1.base| 5) (<= 0 |ULTIMATE.start_main_~numbers~3#1.offset|) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 4 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (< |ULTIMATE.start_main_~i~4#1| 10) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0) (< (select |#length| |ULTIMATE.start_main_~numbers~3#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~4#1|) |ULTIMATE.start_main_~numbers~3#1.offset| 4)) (<= |ULTIMATE.start_getNumbers4_#res#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~4#1|))' at error location [2021-11-23 03:46:24,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:24,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:24,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2021-11-23 03:46:24,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152073538] [2021-11-23 03:46:24,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:24,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:46:24,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:46:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:46:24,178 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-11-23 03:46:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:24,239 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-11-23 03:46:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:46:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 107 [2021-11-23 03:46:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:24,240 INFO L225 Difference]: With dead ends: 122 [2021-11-23 03:46:24,240 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 03:46:24,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:46:24,241 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:24,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 03:46:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-23 03:46:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 1.05) internal successors, (126), 121 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) [2021-11-23 03:46:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-23 03:46:24,245 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 107 [2021-11-23 03:46:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:24,245 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-23 03:46:24,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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) [2021-11-23 03:46:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-23 03:46:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 03:46:24,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:24,246 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:24,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:24,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:24,467 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1819371053, now seen corresponding path program 2 times [2021-11-23 03:46:24,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:24,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259551547] [2021-11-23 03:46:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:24,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 03:46:24,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259551547] [2021-11-23 03:46:24,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259551547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384967673] [2021-11-23 03:46:24,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:46:24,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:24,635 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:24,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 03:46:24,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:46:24,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:24,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:46:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 03:46:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 03:46:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384967673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904832075] [2021-11-23 03:46:26,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:46:26,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:26,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:26,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:26,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:26,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:46:26,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:46:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:46:26,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:26,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 03:46:26,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,626 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:46:26,626 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 3 case distinctions, treesize of input 216 treesize of output 221 [2021-11-23 03:46:26,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:46:26,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:26,981 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:46:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:46:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,063 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 25 treesize of output 25 [2021-11-23 03:46:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:46:27,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,257 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-11-23 03:46:27,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 157 [2021-11-23 03:46:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:27,695 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:30,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12854#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 4) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 4) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= |ULTIMATE.start_main_~numbers~3#1.base| 5) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= |ULTIMATE.start_main_~numbers~3#1.offset| 0) (<= 5 |ULTIMATE.start_main_~numbers~3#1.base|) (= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_#res#1.offset|) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 5 |ULTIMATE.start_getNumbers4_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 10 |ULTIMATE.start_getNumbers4_~i~3#1|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 4 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= |ULTIMATE.start_getNumbers4_#res#1.base| 5) (<= 0 |ULTIMATE.start_main_~numbers~3#1.offset|) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 4 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (< |ULTIMATE.start_main_~i~4#1| 10) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0) (< (select |#length| |ULTIMATE.start_main_~numbers~3#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~4#1|) |ULTIMATE.start_main_~numbers~3#1.offset| 4)) (<= |ULTIMATE.start_getNumbers4_#res#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~4#1|))' at error location [2021-11-23 03:46:30,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:30,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-11-23 03:46:30,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605482558] [2021-11-23 03:46:30,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:30,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 03:46:30,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 03:46:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:46:30,540 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:30,693 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-11-23 03:46:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:46:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 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 119 [2021-11-23 03:46:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:30,694 INFO L225 Difference]: With dead ends: 132 [2021-11-23 03:46:30,694 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 03:46:30,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:46:30,695 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:30,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 03:46:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-11-23 03:46:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 127 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-11-23 03:46:30,699 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 119 [2021-11-23 03:46:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:30,699 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-11-23 03:46:30,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-11-23 03:46:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 03:46:30,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:30,701 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:30,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:30,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:30,911 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 363915852, now seen corresponding path program 1 times [2021-11-23 03:46:30,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:30,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962157102] [2021-11-23 03:46:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:30,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-23 03:46:30,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962157102] [2021-11-23 03:46:30,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962157102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:30,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:30,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:46:30,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939056072] [2021-11-23 03:46:30,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:30,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:46:30,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:46:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:46:30,969 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 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) [2021-11-23 03:46:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:30,983 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2021-11-23 03:46:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:46:30,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 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) Word has length 121 [2021-11-23 03:46:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:30,985 INFO L225 Difference]: With dead ends: 127 [2021-11-23 03:46:30,985 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 03:46:30,985 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 [2021-11-23 03:46:30,986 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:30,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:46:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 03:46:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-23 03:46:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-23 03:46:30,990 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 121 [2021-11-23 03:46:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:30,990 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-23 03:46:30,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 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) [2021-11-23 03:46:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-23 03:46:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 03:46:30,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:30,992 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:30,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 03:46:30,992 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1809078578, now seen corresponding path program 3 times [2021-11-23 03:46:30,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:30,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865107901] [2021-11-23 03:46:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:30,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 03:46:31,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865107901] [2021-11-23 03:46:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865107901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340917531] [2021-11-23 03:46:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:46:31,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:31,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:31,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 03:46:31,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:46:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:46:31,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 03:46:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 108 proven. 57 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:31,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:32,124 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 24 treesize of output 20 [2021-11-23 03:46:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 108 proven. 57 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:46:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340917531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:46:32,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856185795] [2021-11-23 03:46:32,665 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:46:32,666 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:46:32,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:46:32,666 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:46:32,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:46:32,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2021-11-23 03:46:32,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 65 [2021-11-23 03:46:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 311 [2021-11-23 03:46:32,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 03:46:32,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:32,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 03:46:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,044 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-23 03:46:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 221 [2021-11-23 03:46:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,141 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 25 treesize of output 25 [2021-11-23 03:46:33,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:33,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-11-23 03:46:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:46:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,381 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-23 03:46:33,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 275 [2021-11-23 03:46:33,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:33,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 161 [2021-11-23 03:46:33,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:46:33,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:46:33,959 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:46:36,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14176#(and (<= 10 |ULTIMATE.start_getNumbers3_~i~2#1|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.base| 4) (<= |ULTIMATE.start_getNumbers_#res#1.base| 2) (<= |ULTIMATE.start_getNumbers3_#res#1.base| 4) (<= |ULTIMATE.start_getNumbers3_#res#1.offset| 0) (<= |ULTIMATE.start_main_~numbers~3#1.base| 5) (<= |ULTIMATE.start_getNumbers2_#res#1.base| 3) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.offset|) (<= |ULTIMATE.start_main_~numbers~3#1.offset| 0) (<= 5 |ULTIMATE.start_main_~numbers~3#1.base|) (= |~#numbers3~0.offset| 0) (<= 0 |ULTIMATE.start_getNumbers4_#res#1.offset|) (<= 3 |ULTIMATE.start_getNumbers3_~numbers~1#1.base|) (<= 5 |ULTIMATE.start_getNumbers4_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers3_~numbers~1#1.offset|) (<= 10 |ULTIMATE.start_getNumbers4_~i~3#1|) (<= 0 |ULTIMATE.start_getNumbers3_#res#1.offset|) (<= |ULTIMATE.start_getNumbers4_~numbers~2#1.offset| 0) (<= 4 |ULTIMATE.start_getNumbers3_#res#1.base|) (<= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 3 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#numbers3~0.base| 4) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.base| 3) (<= 0 |ULTIMATE.start_getNumbers4_~numbers~2#1.offset|) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (<= |ULTIMATE.start_getNumbers4_#res#1.base| 5) (<= 0 |ULTIMATE.start_main_~numbers~3#1.offset|) (<= 2 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 4 |ULTIMATE.start_getNumbers4_~numbers~2#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (= |~#numbers4~0.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= 5 |~#numbers4~0.base|) (= |~#numbers2~0.offset| 0) (<= |ULTIMATE.start_getNumbers3_~numbers~1#1.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 2) (= 2 |~#array~0.base|) (< |ULTIMATE.start_main_~i~4#1| 10) (= |~#numbers2~0.base| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (= |#NULL.base| 0) (< (select |#length| |ULTIMATE.start_main_~numbers~3#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~4#1|) |ULTIMATE.start_main_~numbers~3#1.offset| 4)) (<= |ULTIMATE.start_getNumbers4_#res#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~4#1|))' at error location [2021-11-23 03:46:36,998 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:46:36,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:46:36,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 39 [2021-11-23 03:46:36,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064863449] [2021-11-23 03:46:36,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:46:36,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 03:46:36,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 03:46:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2441, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 03:46:37,001 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:37,906 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-11-23 03:46:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:46:37,906 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-23 03:46:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:37,907 INFO L225 Difference]: With dead ends: 138 [2021-11-23 03:46:37,907 INFO L226 Difference]: Without dead ends: 138 [2021-11-23 03:46:37,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1022, Invalid=4380, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 03:46:37,910 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:37,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 36 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:46:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-23 03:46:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-23 03:46:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-11-23 03:46:37,914 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 125 [2021-11-23 03:46:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:37,914 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-11-23 03:46:37,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-11-23 03:46:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 03:46:37,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:37,916 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:37,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-23 03:46:38,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:38,123 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-23 03:46:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1888602108, now seen corresponding path program 4 times [2021-11-23 03:46:38,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:38,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734822959] [2021-11-23 03:46:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:38,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 91 proven. 19 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 03:46:38,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:38,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734822959] [2021-11-23 03:46:38,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734822959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:46:38,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513185383] [2021-11-23 03:46:38,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:46:38,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:46:38,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:38,462 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:46:38,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 03:46:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:46:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:46:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-23 03:46:38,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:46:38,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513185383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:38,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:46:38,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 25 [2021-11-23 03:46:38,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655132826] [2021-11-23 03:46:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:38,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:46:38,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:46:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:46:38,893 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:46:38,953 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2021-11-23 03:46:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:46:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-23 03:46:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:46:38,954 INFO L225 Difference]: With dead ends: 136 [2021-11-23 03:46:38,954 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:46:38,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:46:38,955 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:46:38,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:46:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:46:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:46:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:46:38,956 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2021-11-23 03:46:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:46:38,956 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:46:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:46:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:46:38,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:46:38,962 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (16 of 17 remaining) [2021-11-23 03:46:38,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (15 of 17 remaining) [2021-11-23 03:46:38,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (14 of 17 remaining) [2021-11-23 03:46:38,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (13 of 17 remaining) [2021-11-23 03:46:38,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (12 of 17 remaining) [2021-11-23 03:46:38,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (11 of 17 remaining) [2021-11-23 03:46:38,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (10 of 17 remaining) [2021-11-23 03:46:38,964 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (9 of 17 remaining) [2021-11-23 03:46:38,964 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (8 of 17 remaining) [2021-11-23 03:46:38,964 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (7 of 17 remaining) [2021-11-23 03:46:38,964 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (6 of 17 remaining) [2021-11-23 03:46:38,964 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (5 of 17 remaining) [2021-11-23 03:46:38,964 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (4 of 17 remaining) [2021-11-23 03:46:38,965 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (3 of 17 remaining) [2021-11-23 03:46:38,965 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (2 of 17 remaining) [2021-11-23 03:46:38,965 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (1 of 17 remaining) [2021-11-23 03:46:38,965 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2021-11-23 03:46:39,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:46:39,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 03:46:39,178 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:39,180 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:46:39,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:46:39 BoogieIcfgContainer [2021-11-23 03:46:39,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:46:39,184 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:46:39,184 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:46:39,185 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:46:39,185 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:06" (3/4) ... [2021-11-23 03:46:39,187 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:46:39,204 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2021-11-23 03:46:39,204 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-23 03:46:39,205 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 03:46:39,205 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:46:39,248 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:46:39,248 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:46:39,248 INFO L158 Benchmark]: Toolchain (without parser) took 93354.56ms. Allocated memory was 109.1MB in the beginning and 255.9MB in the end (delta: 146.8MB). Free memory was 76.0MB in the beginning and 185.8MB in the end (delta: -109.8MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,249 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory was 64.6MB in the beginning and 64.5MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:46:39,249 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.22ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 83.1MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,249 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.36ms. Allocated memory is still 109.1MB. Free memory was 83.1MB in the beginning and 81.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,250 INFO L158 Benchmark]: Boogie Preprocessor took 49.89ms. Allocated memory is still 109.1MB. Free memory was 81.4MB in the beginning and 80.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,250 INFO L158 Benchmark]: RCFGBuilder took 598.31ms. Allocated memory is still 109.1MB. Free memory was 80.1MB in the beginning and 64.3MB in the end (delta: 15.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,250 INFO L158 Benchmark]: TraceAbstraction took 92193.35ms. Allocated memory was 109.1MB in the beginning and 255.9MB in the end (delta: 146.8MB). Free memory was 64.0MB in the beginning and 188.6MB in the end (delta: -124.6MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,250 INFO L158 Benchmark]: Witness Printer took 63.75ms. Allocated memory is still 255.9MB. Free memory was 188.6MB in the beginning and 185.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:46:39,252 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory was 64.6MB in the beginning and 64.5MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.22ms. Allocated memory is still 109.1MB. Free memory was 75.8MB in the beginning and 83.1MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.36ms. Allocated memory is still 109.1MB. Free memory was 83.1MB in the beginning and 81.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.89ms. Allocated memory is still 109.1MB. Free memory was 81.4MB in the beginning and 80.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 598.31ms. Allocated memory is still 109.1MB. Free memory was 80.1MB in the beginning and 64.3MB in the end (delta: 15.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 92193.35ms. Allocated memory was 109.1MB in the beginning and 255.9MB in the end (delta: 146.8MB). Free memory was 64.0MB in the beginning and 188.6MB in the end (delta: -124.6MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. * Witness Printer took 63.75ms. Allocated memory is still 255.9MB. Free memory was 188.6MB in the beginning and 185.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 92.1s, OverallIterations: 38, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2557 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2557 mSDsluCounter, 1133 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1163 mSDsCounter, 334 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3269 IncrementalHoareTripleChecker+Invalid, 3603 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 334 mSolverCounterUnsat, 334 mSDtfsCounter, 3269 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4265 GetRequests, 3631 SyntacticMatches, 7 SemanticMatches, 627 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4500 ImplicationChecksByTransitivity, 39.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=37, InterpolantAutomatonStates: 279, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 158 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 22.9s InterpolantComputationTime, 3797 NumberOfCodeBlocks, 3343 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 4960 ConstructedInterpolants, 0 QuantifiedInterpolants, 52391 SizeOfPredicates, 49 NumberOfNonLiveVariables, 6154 ConjunctsInSsa, 287 ConjunctsInUnsatCore, 82 InterpolantComputations, 18 PerfectInterpolantSequences, 19763/20706 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 24, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 74, TOOLS_POST_TIME: 1.9s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 74, TOOLS_QUANTIFIERELIM_TIME: 1.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 142, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 12, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 18, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 1.7s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.7s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 18, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 577, DAG_COMPRESSION_RETAINED_NODES: 86, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 03:46:39,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4995ffdc-7203-48d3-9005-597b001b306c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE