./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:20:20,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:20:20,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:20:20,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:20:20,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:20:20,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:20:20,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:20:20,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:20:20,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:20:20,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:20:20,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:20:20,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:20:20,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:20:20,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:20:20,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:20:20,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:20:20,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:20:20,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:20:20,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:20:20,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:20:20,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:20:20,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:20:20,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:20:20,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:20:20,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:20:20,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:20:20,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:20:20,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:20:20,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:20:20,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:20:20,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:20:20,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:20:20,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:20:20,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:20:20,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:20:20,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:20:20,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:20:20,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:20:20,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:20:20,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:20:20,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:20:20,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:20:20,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:20:20,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:20:20,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:20:20,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:20:20,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:20:20,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:20:20,694 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:20:20,694 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:20:20,694 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:20:20,694 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:20:20,695 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:20:20,695 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:20:20,695 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:20:20,695 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:20:20,696 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:20:20,696 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:20:20,696 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:20:20,696 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:20:20,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:20:20,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:20:20,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:20:20,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:20:20,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:20:20,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:20:20,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:20:20,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:20:20,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:20:20,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:20:20,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:20:20,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:20:20,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:20:20,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:20:20,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:20,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:20:20,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:20:20,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:20:20,702 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:20:20,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:20:20,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:20:20,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:20:20,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:20:20,703 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_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2021-11-21 00:20:21,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:20:21,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:20:21,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:20:21,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:20:21,102 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:20:21,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-21 00:20:21,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/data/ecada5089/4c87af35b490480aae596885f2fa8b52/FLAGc71575b7f [2021-11-21 00:20:21,763 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:20:21,768 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-21 00:20:21,777 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/data/ecada5089/4c87af35b490480aae596885f2fa8b52/FLAGc71575b7f [2021-11-21 00:20:22,095 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/data/ecada5089/4c87af35b490480aae596885f2fa8b52 [2021-11-21 00:20:22,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:20:22,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:20:22,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:22,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:20:22,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:20:22,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19caea67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22, skipping insertion in model container [2021-11-21 00:20:22,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:20:22,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:20:22,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-21 00:20:22,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:22,417 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:20:22,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-21 00:20:22,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:20:22,466 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:20:22,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22 WrapperNode [2021-11-21 00:20:22,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:20:22,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:22,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:20:22,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:20:22,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,513 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2021-11-21 00:20:22,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:20:22,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:20:22,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:20:22,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:20:22,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:20:22,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:20:22,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:20:22,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:20:22,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (1/1) ... [2021-11-21 00:20:22,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:20:22,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:22,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:20:22,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:20:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:20:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:20:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:20:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:20:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:20:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:20:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:20:22,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:20:22,766 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:20:22,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:20:23,052 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:20:23,167 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:20:23,167 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-21 00:20:23,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:23 BoogieIcfgContainer [2021-11-21 00:20:23,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:20:23,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:20:23,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:20:23,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:20:23,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:20:22" (1/3) ... [2021-11-21 00:20:23,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a458e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:23, skipping insertion in model container [2021-11-21 00:20:23,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:20:22" (2/3) ... [2021-11-21 00:20:23,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a458e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:20:23, skipping insertion in model container [2021-11-21 00:20:23,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:20:23" (3/3) ... [2021-11-21 00:20:23,181 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-11-21 00:20:23,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:20:23,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:20:23,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:20:23,254 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-21 00:20:23,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:20:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) [2021-11-21 00:20:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:20:23,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:23,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:23,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2021-11-21 00:20:23,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:23,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883411121] [2021-11-21 00:20:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:23,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:23,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651949928] [2021-11-21 00:20:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:23,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:23,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:23,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:20:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:20:23,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:23,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:23,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:23,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883411121] [2021-11-21 00:20:23,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:20:23,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651949928] [2021-11-21 00:20:23,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651949928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:23,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:23,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:20:23,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198549635] [2021-11-21 00:20:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:23,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:20:23,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:20:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:23,844 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:23,961 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2021-11-21 00:20:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:20:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-21 00:20:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:23,977 INFO L225 Difference]: With dead ends: 35 [2021-11-21 00:20:23,977 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:20:23,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:20:23,989 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:23,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:20:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-21 00:20:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2021-11-21 00:20:24,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2021-11-21 00:20:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:24,043 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2021-11-21 00:20:24,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2021-11-21 00:20:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:20:24,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:24,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:24,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:24,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:20:24,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2021-11-21 00:20:24,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954064363] [2021-11-21 00:20:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:24,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:24,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:24,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651094282] [2021-11-21 00:20:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:24,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:24,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:24,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:20:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:24,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:20:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:24,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:24,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:24,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954064363] [2021-11-21 00:20:24,495 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:20:24,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651094282] [2021-11-21 00:20:24,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651094282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:24,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:24,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:24,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254166311] [2021-11-21 00:20:24,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:24,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:20:24,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:20:24,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:24,499 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2021-11-21 00:20:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:24,636 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2021-11-21 00:20:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:20:24,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:20:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:24,640 INFO L225 Difference]: With dead ends: 47 [2021-11-21 00:20:24,640 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 00:20:24,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:24,647 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:24,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 00:20:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2021-11-21 00:20:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2021-11-21 00:20:24,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2021-11-21 00:20:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:24,667 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2021-11-21 00:20:24,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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) [2021-11-21 00:20:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2021-11-21 00:20:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:20:24,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:24,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:24,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:24,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:24,884 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:24,885 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2021-11-21 00:20:24,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:24,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68630548] [2021-11-21 00:20:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:24,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:24,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:24,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685131203] [2021-11-21 00:20:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:24,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:24,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:24,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:20:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:20:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:25,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:20:25,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:25,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68630548] [2021-11-21 00:20:25,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:20:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685131203] [2021-11-21 00:20:25,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685131203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:25,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:20:25,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:20:25,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216424636] [2021-11-21 00:20:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:25,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:20:25,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:20:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:25,038 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-11-21 00:20:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:25,126 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2021-11-21 00:20:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:20:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 13 [2021-11-21 00:20:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:25,128 INFO L225 Difference]: With dead ends: 50 [2021-11-21 00:20:25,128 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:20:25,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:20:25,131 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:25,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:20:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:20:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-11-21 00:20:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-21 00:20:25,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2021-11-21 00:20:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:25,142 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-21 00:20:25,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-11-21 00:20:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-21 00:20:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:20:25,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:25,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:25,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:25,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 00:20:25,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:25,365 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2021-11-21 00:20:25,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:25,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042582025] [2021-11-21 00:20:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:25,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:25,371 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:25,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350966459] [2021-11-21 00:20:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:25,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:25,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:25,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:25,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:20:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:20:25,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:25,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:25,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042582025] [2021-11-21 00:20:25,598 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:20:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350966459] [2021-11-21 00:20:25,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350966459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572203889] [2021-11-21 00:20:25,626 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 00:20:25,627 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:20:25,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:20:25,639 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:20:25,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:20:25,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:25,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:25,892 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:20:25,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:20:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:26,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:26,110 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:20:26,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:20:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:20:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:27,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:27,574 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:20:27,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:20:29,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:30,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:31,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:32,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:20:33,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1572203889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:33,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:20:33,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-21 00:20:33,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155271050] [2021-11-21 00:20:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:33,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:20:33,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:20:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:20:33,124 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-11-21 00:20:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:33,634 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2021-11-21 00:20:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:20:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 14 [2021-11-21 00:20:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:33,635 INFO L225 Difference]: With dead ends: 50 [2021-11-21 00:20:33,636 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 00:20:33,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:20:33,637 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:33,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:20:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 00:20:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-11-21 00:20:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2021-11-21 00:20:33,651 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2021-11-21 00:20:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:33,651 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2021-11-21 00:20:33,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-11-21 00:20:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2021-11-21 00:20:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:20:33,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:33,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:33,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:33,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:33,872 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2021-11-21 00:20:33,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:33,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158881270] [2021-11-21 00:20:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:33,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:33,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888025487] [2021-11-21 00:20:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:33,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:33,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:20:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:33,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:20:33,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:20:33,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:20:34,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:34,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158881270] [2021-11-21 00:20:34,050 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:20:34,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888025487] [2021-11-21 00:20:34,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888025487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:34,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790734214] [2021-11-21 00:20:34,054 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-21 00:20:34,054 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:20:34,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:20:34,055 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:20:34,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:20:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:34,154 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:20:34,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:20:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:34,294 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:20:34,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:20:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:20:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:35,555 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:20:35,556 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:20:36,303 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 37 treesize of output 33 [2021-11-21 00:20:36,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:38,353 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:20:38,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:20:38,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:20:39,804 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:20:39,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:20:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:40,572 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 37 treesize of output 33 [2021-11-21 00:20:41,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:41,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:20:41,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:42,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:42,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:42,757 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:42,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:42,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:42,888 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:20:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:20:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:42,983 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:43,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:43,390 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:20:43,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:20:43,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:43,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:43,606 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:20:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:20:43,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:43,835 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:43,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:44,250 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:44,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:44,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:44,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:44,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:44,355 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:20:44,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:20:44,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:44,545 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:44,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:45,005 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:20:45,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:20:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:45,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:45,230 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:20:45,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:20:45,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:45,558 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:46,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:46,367 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:46,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:46,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:46,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:46,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:46,594 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:20:46,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:20:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:46,821 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:46,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:46,903 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:20:47,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [790734214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:20:47,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:20:47,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 13 [2021-11-21 00:20:47,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004376710] [2021-11-21 00:20:47,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:20:47,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:20:47,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:20:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:20:47,591 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-11-21 00:20:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:49,417 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2021-11-21 00:20:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:20:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 19 [2021-11-21 00:20:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:49,419 INFO L225 Difference]: With dead ends: 57 [2021-11-21 00:20:49,420 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 00:20:49,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:20:49,421 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:49,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:20:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 00:20:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2021-11-21 00:20:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2021-11-21 00:20:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2021-11-21 00:20:49,437 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2021-11-21 00:20:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2021-11-21 00:20:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-11-21 00:20:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2021-11-21 00:20:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:20:49,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:49,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:49,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:49,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:49,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2021-11-21 00:20:49,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:49,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476482204] [2021-11-21 00:20:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:49,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:49,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:49,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935961646] [2021-11-21 00:20:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:49,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:49,651 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:49,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:20:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:20:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:20:49,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:20:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:20:49,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:20:49,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476482204] [2021-11-21 00:20:49,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:20:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935961646] [2021-11-21 00:20:49,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935961646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:20:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364811082] [2021-11-21 00:20:49,838 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:20:49,838 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:20:49,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:20:49,839 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:20:49,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:20:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:49,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:49,937 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:20:49,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:20:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:50,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:20:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:20:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:50,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:51,077 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:20:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:20:52,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:52,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:54,234 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:20:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:20:54,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:55,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:20:55,864 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:20:55,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:20:56,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:56,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:57,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:57,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:20:57,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:57,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:20:58,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:58,350 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:20:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:20:58,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:58,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:58,553 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:20:58,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 127 [2021-11-21 00:20:58,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:58,696 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:58,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,109 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:59,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:59,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,221 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:20:59,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 112 [2021-11-21 00:20:59,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,320 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:20:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:20:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,618 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:20:59,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:20:59,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:20:59,841 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:20:59,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:21:00,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:00,256 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:00,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:00,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:00,775 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:00,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:00,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:00,914 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:21:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:21:01,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:01,208 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:02,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:02,368 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:02,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:02,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:02,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:02,686 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:21:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:21:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:02,964 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:02,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:02,989 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:21:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1364811082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:03,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:21:03,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 15 [2021-11-21 00:21:03,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522343945] [2021-11-21 00:21:03,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:03,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:21:03,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:21:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:21:03,882 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:05,474 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2021-11-21 00:21:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:21:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 00:21:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:05,475 INFO L225 Difference]: With dead ends: 59 [2021-11-21 00:21:05,476 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 00:21:05,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:21:05,477 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:05,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:21:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 00:21:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-11-21 00:21:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-11-21 00:21:05,493 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2021-11-21 00:21:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:05,494 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-11-21 00:21:05,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-11-21 00:21:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:21:05,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:05,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:05,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:05,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:05,714 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2021-11-21 00:21:05,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:05,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92657831] [2021-11-21 00:21:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:05,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:05,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:21:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119804340] [2021-11-21 00:21:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:05,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:05,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:05,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:21:05,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:21:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:05,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:21:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:21:05,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:21:05,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:05,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92657831] [2021-11-21 00:21:05,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:21:05,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119804340] [2021-11-21 00:21:05,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119804340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:05,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70288687] [2021-11-21 00:21:05,928 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:21:05,929 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:21:05,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:21:05,929 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:21:05,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:21:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:06,011 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:21:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:21:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:21:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:21:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:07,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:07,159 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:21:07,159 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:21:08,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:08,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:10,139 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:21:10,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 139 [2021-11-21 00:21:10,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:10,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:11,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:21:11,773 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:21:11,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:21:12,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:12,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:13,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:21:13,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:14,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:14,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:14,476 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:14,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:14,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:14,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:14,594 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:14,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:21:14,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:14,790 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:14,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:15,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:15,096 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:15,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:15,322 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:21:15,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:21:15,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:15,472 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:15,828 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:15,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:16,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:16,023 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:16,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:21:16,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:16,379 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:16,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:16,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:16,879 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:17,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:17,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:17,096 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:21:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:21:17,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:17,418 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:17,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:18,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:18,307 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:18,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:18,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:18,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:18,503 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:21:18,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:18,828 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:18,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:19,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:19,160 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:19,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:19,960 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:21:19,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:21:20,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:20,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:20,169 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:21:20,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 157 [2021-11-21 00:21:20,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:20,553 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:20,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:20,979 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:21,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:21,399 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:21:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:21:21,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:21,628 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:21:21,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:21:22,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:22,081 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:22,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:22,358 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:22,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:23,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:23,022 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:23,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:23,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:23,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:23,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:23,189 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:23,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:21:23,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:23,641 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:23,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:23,920 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:23,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:24,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:24,813 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:24,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:24,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:24,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:25,163 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:21:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:21:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:25,389 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:25,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:25,423 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:21:26,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:21:26,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:21:26,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 00:21:26,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131025313] [2021-11-21 00:21:26,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:21:26,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:21:26,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:26,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:21:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:21:26,635 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:26,838 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2021-11-21 00:21:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:21:26,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 00:21:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:26,839 INFO L225 Difference]: With dead ends: 95 [2021-11-21 00:21:26,840 INFO L226 Difference]: Without dead ends: 68 [2021-11-21 00:21:26,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:21:26,841 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 14 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:21:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-21 00:21:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-11-21 00:21:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-11-21 00:21:26,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2021-11-21 00:21:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:26,876 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-11-21 00:21:26,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-11-21 00:21:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:21:26,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:26,878 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:26,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:27,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:21:27,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2021-11-21 00:21:27,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818528335] [2021-11-21 00:21:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:27,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:27,088 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:21:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262639884] [2021-11-21 00:21:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:21:27,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:27,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:21:27,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:21:27,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:21:27,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:21:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:21:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:21:27,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:21:27,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818528335] [2021-11-21 00:21:27,393 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:21:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262639884] [2021-11-21 00:21:27,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262639884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919128851] [2021-11-21 00:21:27,397 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:21:27,397 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:21:27,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:21:27,398 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:21:27,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:21:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:27,478 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:21:27,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:21:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:27,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:27,594 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:21:27,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:21:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:28,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:21:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:28,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:28,809 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:21:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:21:30,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:30,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:32,401 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:21:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 139 [2021-11-21 00:21:32,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:33,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:33,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:21:33,850 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:21:33,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:21:34,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:34,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:35,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:21:35,387 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:21:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:21:35,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:36,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:36,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:36,491 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:36,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:36,694 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:21:36,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 137 [2021-11-21 00:21:36,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:36,906 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:36,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:37,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:37,351 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:37,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:37,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:37,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:37,546 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:37,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 112 [2021-11-21 00:21:37,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:37,691 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:37,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:38,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:38,196 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:38,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:38,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:38,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:38,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:38,346 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:38,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:21:38,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:38,683 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:39,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:39,135 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:21:39,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:21:39,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:39,425 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:21:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:21:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:39,696 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:39,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:40,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:40,585 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:21:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:21:40,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:40,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:40,789 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:21:40,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:21:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:41,202 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:41,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:41,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:41,608 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:41,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:42,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:42,258 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:42,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:42,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:42,402 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:42,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:21:42,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:42,846 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:43,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:43,105 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:43,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:43,760 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:21:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:21:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:44,161 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:21:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:21:44,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:44,712 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:44,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:44,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:44,962 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:44,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:45,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:45,652 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:45,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:45,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:45,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:45,944 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:45,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:21:46,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:46,319 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:46,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:46,669 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:46,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:47,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:47,797 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:47,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:47,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:47,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:47,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:47,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:47,947 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:47,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:21:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:48,123 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:48,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:48,199 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:21:49,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:21:49,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:21:49,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 00:21:49,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671262056] [2021-11-21 00:21:49,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:21:49,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:21:49,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:49,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:21:49,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:21:49,442 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:49,725 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2021-11-21 00:21:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:21:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 00:21:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:49,728 INFO L225 Difference]: With dead ends: 162 [2021-11-21 00:21:49,728 INFO L226 Difference]: Without dead ends: 131 [2021-11-21 00:21:49,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:21:49,733 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 231 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:49,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 16 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:21:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-21 00:21:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2021-11-21 00:21:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 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) [2021-11-21 00:21:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-21 00:21:49,796 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2021-11-21 00:21:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:49,797 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-21 00:21:49,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-21 00:21:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:21:49,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:49,802 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:49,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:21:50,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:21:50,019 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2021-11-21 00:21:50,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:50,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862274119] [2021-11-21 00:21:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:50,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:50,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:21:50,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735224064] [2021-11-21 00:21:50,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:21:50,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:50,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:50,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:21:50,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:21:50,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:21:50,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:21:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:21:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-21 00:21:50,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-21 00:21:50,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862274119] [2021-11-21 00:21:50,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:21:50,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735224064] [2021-11-21 00:21:50,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735224064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:50,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541777503] [2021-11-21 00:21:50,511 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:21:50,511 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:21:50,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:21:50,512 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:21:50,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:21:50,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:50,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:50,616 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:21:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:21:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:50,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:21:51,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:51,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:21:51,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:51,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:52,019 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:21:52,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:21:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:55,416 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:21:55,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:21:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:56,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:21:56,855 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:21:56,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:21:57,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:58,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:21:58,480 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:21:58,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:21:58,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:59,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:21:59,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:59,641 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:21:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:59,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:59,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:59,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:59,816 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:21:59,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:21:59,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:59,988 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:21:59,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:00,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:00,398 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:00,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:00,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:00,677 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:22:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:22:00,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:00,846 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:00,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:01,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:01,247 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:01,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:01,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:01,582 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:22:01,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:22:01,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:01,842 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:01,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:02,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:02,229 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:02,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:02,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:02,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:02,492 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:02,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:22:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:02,806 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:03,708 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:03,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:03,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:03,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:03,932 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:04,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:04,310 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:04,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:04,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:04,751 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:05,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:05,411 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:22:05,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:22:05,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:05,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:05,680 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:22:05,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 141 [2021-11-21 00:22:06,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:06,095 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:06,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:06,361 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:06,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:06,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:06,900 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:06,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:07,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:07,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:07,228 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:07,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:07,572 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:07,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:07,897 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:07,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:08,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:08,614 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:22:08,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:22:08,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:08,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:08,939 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:22:08,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:22:09,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:09,372 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:09,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:09,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:09,693 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:10,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:10,683 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:10,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:10,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:10,922 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:22:10,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:22:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:11,065 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:11,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:11,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:22:12,510 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:22:12,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:22:12,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-21 00:22:12,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986938871] [2021-11-21 00:22:12,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:22:12,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:22:12,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:22:12,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:22:12,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:22:12,512 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-11-21 00:22:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:22:12,887 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2021-11-21 00:22:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:22:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 63 [2021-11-21 00:22:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:22:12,890 INFO L225 Difference]: With dead ends: 260 [2021-11-21 00:22:12,890 INFO L226 Difference]: Without dead ends: 178 [2021-11-21 00:22:12,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:22:12,893 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:22:12,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 51 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:22:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-21 00:22:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2021-11-21 00:22:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 99 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) [2021-11-21 00:22:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2021-11-21 00:22:12,938 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2021-11-21 00:22:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:22:12,938 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2021-11-21 00:22:12,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-11-21 00:22:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2021-11-21 00:22:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:22:12,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:22:12,942 INFO L514 BasicCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:22:12,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 00:22:13,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:22:13,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:22:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:22:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2021-11-21 00:22:13,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:22:13,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686904377] [2021-11-21 00:22:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:22:13,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:22:13,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:22:13,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893577328] [2021-11-21 00:22:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:22:13,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:22:13,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:22:13,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:22:13,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:22:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:22:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:22:13,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:22:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-21 00:22:13,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:22:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-21 00:22:13,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:22:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686904377] [2021-11-21 00:22:13,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:22:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893577328] [2021-11-21 00:22:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893577328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:22:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998521528] [2021-11-21 00:22:13,775 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:22:13,776 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:22:13,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:22:13,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:22:13,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:22:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:13,868 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:22:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:22:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:13,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:13,994 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:22:13,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:22:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:22:15,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:15,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:15,254 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:22:15,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:22:16,762 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 37 treesize of output 33 [2021-11-21 00:22:17,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:18,905 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:22:18,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:22:19,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:19,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:20,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:22:20,377 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:22:20,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:22:20,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:21,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:21,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:22:22,043 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:22:22,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:22:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:22,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:23,265 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:23,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:23,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:23,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:23,435 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:22:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 127 [2021-11-21 00:22:23,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:23,682 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:24,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:24,113 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:24,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:24,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:24,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:24,353 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:22:24,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 128 [2021-11-21 00:22:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:24,492 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:24,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:24,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:24,948 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:24,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:25,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:25,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:25,418 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:22:25,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:22:25,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:25,788 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:26,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:26,226 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:26,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:26,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:26,388 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:26,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:22:26,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:26,706 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:26,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:27,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:27,744 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:27,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:27,897 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:27,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:28,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:28,356 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:28,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:28,701 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:29,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:29,426 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:29,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:29,719 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:29,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:22:30,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:30,069 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:30,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:30,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:30,439 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:31,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:31,054 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:31,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:31,277 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:31,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:31,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:31,692 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:31,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:31,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:31,965 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:31,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:32,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:32,838 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:33,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:33,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:33,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:33,118 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:33,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:33,412 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:33,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:33,807 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:33,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:34,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:34,863 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:35,078 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:22:35,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:22:35,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:35,391 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:35,502 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:22:36,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:22:36,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:22:36,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-21 00:22:36,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223882962] [2021-11-21 00:22:36,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:22:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:22:36,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:22:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:22:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:22:36,798 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-11-21 00:22:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:22:37,338 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2021-11-21 00:22:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:22:37,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 87 [2021-11-21 00:22:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:22:37,341 INFO L225 Difference]: With dead ends: 327 [2021-11-21 00:22:37,341 INFO L226 Difference]: Without dead ends: 235 [2021-11-21 00:22:37,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:22:37,343 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 276 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:22:37,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 32 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:22:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-21 00:22:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2021-11-21 00:22:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2242424242424241) internal successors, (202), 165 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:22:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2021-11-21 00:22:37,429 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2021-11-21 00:22:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:22:37,431 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2021-11-21 00:22:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-11-21 00:22:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2021-11-21 00:22:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-21 00:22:37,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:22:37,444 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:22:37,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:22:37,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:22:37,657 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:22:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:22:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2021-11-21 00:22:37,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:22:37,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410864377] [2021-11-21 00:22:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:22:37,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:22:37,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:22:37,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799389238] [2021-11-21 00:22:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:22:37,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:22:37,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:22:37,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:22:37,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:22:37,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:22:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:22:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:22:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:22:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2021-11-21 00:22:38,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:22:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2021-11-21 00:22:38,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:22:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410864377] [2021-11-21 00:22:38,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:22:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799389238] [2021-11-21 00:22:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799389238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:22:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866351871] [2021-11-21 00:22:38,510 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:22:38,510 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:22:38,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:22:38,511 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:22:38,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:22:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:38,619 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:22:38,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:22:38,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:38,741 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:22:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:22:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:39,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:22:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:40,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:40,067 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:22:40,067 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:22:40,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:43,141 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:22:43,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 139 [2021-11-21 00:22:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:43,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:44,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:44,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:44,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:22:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:46,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:22:46,230 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:22:46,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:22:46,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:22:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:47,415 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:47,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:47,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:47,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:47,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:47,642 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:47,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:22:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:47,774 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:48,231 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:48,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:48,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:48,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:48,439 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:22:48,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 128 [2021-11-21 00:22:48,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:48,638 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:48,995 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:49,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:49,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:49,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:49,261 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:49,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:22:49,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:49,583 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:49,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:50,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:50,150 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:50,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:50,512 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:22:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:22:50,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:50,845 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:50,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:51,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:51,773 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:51,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:51,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:52,002 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:52,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:52,398 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:52,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:52,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:52,765 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:52,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:53,644 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:53,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:53,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:53,948 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:53,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:22:54,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:54,365 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:54,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:54,706 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:54,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:55,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:55,313 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:55,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:55,551 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:55,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:56,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:56,105 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:56,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:56,443 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:56,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:57,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:57,207 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:57,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:22:57,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:57,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:57,421 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:22:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:22:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:57,889 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:58,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:58,227 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:58,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:59,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:59,224 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:22:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:22:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:59,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:59,467 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:22:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:22:59,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:22:59,786 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:22:59,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:22:59,824 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:01,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:23:01,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:23:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-21 00:23:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476332909] [2021-11-21 00:23:01,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:23:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:23:01,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:23:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:23:01,123 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-11-21 00:23:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:01,441 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2021-11-21 00:23:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:23:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-21 00:23:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:01,445 INFO L225 Difference]: With dead ends: 398 [2021-11-21 00:23:01,446 INFO L226 Difference]: Without dead ends: 344 [2021-11-21 00:23:01,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:23:01,448 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 168 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:01,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 31 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:23:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-21 00:23:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2021-11-21 00:23:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2471264367816093) internal successors, (217), 174 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2021-11-21 00:23:01,521 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2021-11-21 00:23:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:01,522 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2021-11-21 00:23:01,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-11-21 00:23:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2021-11-21 00:23:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 00:23:01,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:01,525 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:01,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:01,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:23:01,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2021-11-21 00:23:01,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401616361] [2021-11-21 00:23:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:01,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:01,749 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:23:01,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389035230] [2021-11-21 00:23:01,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:23:01,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:01,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:01,751 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:01,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:23:01,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:23:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:23:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:23:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2021-11-21 00:23:02,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:23:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2021-11-21 00:23:02,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401616361] [2021-11-21 00:23:02,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:23:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389035230] [2021-11-21 00:23:02,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389035230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:23:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603949384] [2021-11-21 00:23:02,297 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:23:02,298 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:23:02,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:23:02,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:23:02,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:23:02,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,385 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:23:02,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:23:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:02,524 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:23:02,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:23:03,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:23:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:03,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:03,808 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:23:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:23:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:05,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:07,474 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:23:07,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:23:07,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:08,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:23:09,063 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:23:09,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:23:09,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:09,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:10,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:23:10,847 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:23:10,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:23:11,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:11,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:11,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:12,010 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:12,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:12,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:12,293 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:23:12,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 137 [2021-11-21 00:23:12,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:12,501 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:12,910 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:12,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:13,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:13,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:13,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:13,094 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 112 [2021-11-21 00:23:13,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:13,177 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:13,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:13,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:13,567 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:13,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:13,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:13,972 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:23:13,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:23:14,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:14,169 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:14,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:14,820 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:14,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:14,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:14,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:14,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:14,979 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:23:15,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:15,156 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:15,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:16,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:16,166 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:16,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:16,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:16,374 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:16,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:23:16,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:16,841 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:16,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:17,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:17,253 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:18,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:18,056 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:18,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:18,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:18,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:18,284 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:18,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:23:18,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:18,701 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:18,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:18,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:18,963 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:18,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:19,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:19,660 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:23:19,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:23:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:19,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:20,078 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:23:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:23:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:20,529 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:20,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:20,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:20,959 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:20,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:21,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:21,710 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:21,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:22,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:22,131 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:22,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:23:22,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:22,559 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:22,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:22,969 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:24,009 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:24,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:24,334 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:23:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:23:24,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:24,730 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:24,843 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:26,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:23:26,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:23:26,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-21 00:23:26,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735465021] [2021-11-21 00:23:26,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:23:26,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:23:26,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:23:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:23:26,208 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:26,476 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2021-11-21 00:23:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:23:26,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 141 [2021-11-21 00:23:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:26,479 INFO L225 Difference]: With dead ends: 293 [2021-11-21 00:23:26,479 INFO L226 Difference]: Without dead ends: 234 [2021-11-21 00:23:26,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:23:26,481 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:26,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:23:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-21 00:23:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2021-11-21 00:23:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2021-11-21 00:23:26,545 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2021-11-21 00:23:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:26,545 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2021-11-21 00:23:26,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2021-11-21 00:23:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 00:23:26,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:26,548 INFO L514 BasicCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:26,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:26,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:23:26,756 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2021-11-21 00:23:26,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378518003] [2021-11-21 00:23:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:26,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:26,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:23:26,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80083349] [2021-11-21 00:23:26,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:23:26,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:26,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:26,768 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:26,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:23:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:23:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2021-11-21 00:23:27,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:23:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2021-11-21 00:23:27,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378518003] [2021-11-21 00:23:27,861 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:23:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80083349] [2021-11-21 00:23:27,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80083349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:23:27,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202452268] [2021-11-21 00:23:27,863 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:23:27,863 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:23:27,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:23:27,864 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:23:27,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:23:27,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:27,990 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:23:27,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:23:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,172 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:23:28,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:23:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:23:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:29,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:29,444 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:23:29,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:23:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:31,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:33,147 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:23:33,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:23:33,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:33,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:34,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:23:35,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:35,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:36,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:23:36,640 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:23:36,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:23:37,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:23:37,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:37,878 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:37,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:38,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:38,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:38,077 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:23:38,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 127 [2021-11-21 00:23:38,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:38,321 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:38,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:38,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:38,695 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:38,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:38,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:38,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:38,902 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:23:38,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 128 [2021-11-21 00:23:39,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:39,157 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:39,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:39,580 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:39,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:39,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:39,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:39,939 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:23:39,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:23:40,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:40,294 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:40,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:40,849 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:23:40,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:23:41,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:41,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:41,194 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:23:41,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:23:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:41,554 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:41,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:42,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:42,458 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:42,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:42,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:42,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:42,809 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:42,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:23:43,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:43,304 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:43,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:43,651 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:43,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:44,491 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:23:44,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:23:44,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:44,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:45,012 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:23:45,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 154 [2021-11-21 00:23:45,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:45,409 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:45,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:45,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:45,712 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:46,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:46,322 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:46,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:46,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:46,611 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:46,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:23:47,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:47,090 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:47,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:47,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:47,485 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:47,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:48,398 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:48,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:48,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:48,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:48,628 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:48,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:23:49,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:49,170 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:49,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:49,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:49,657 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:50,692 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:50,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:50,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:51,030 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:23:51,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:23:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:51,406 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:23:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:23:51,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:52,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:23:52,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:23:52,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-21 00:23:52,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68158362] [2021-11-21 00:23:52,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:23:52,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:23:52,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:23:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=886, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 00:23:52,947 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-11-21 00:23:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:54,450 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2021-11-21 00:23:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:23:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 143 [2021-11-21 00:23:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:54,455 INFO L225 Difference]: With dead ends: 831 [2021-11-21 00:23:54,455 INFO L226 Difference]: Without dead ends: 664 [2021-11-21 00:23:54,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=765, Invalid=1491, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 00:23:54,458 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 860 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:54,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 68 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:23:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-21 00:23:54,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2021-11-21 00:23:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.185897435897436) internal successors, (370), 312 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2021-11-21 00:23:54,546 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2021-11-21 00:23:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:54,546 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2021-11-21 00:23:54,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-11-21 00:23:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2021-11-21 00:23:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-21 00:23:54,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:54,550 INFO L514 BasicCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:54,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:54,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:23:54,776 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2021-11-21 00:23:54,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294755022] [2021-11-21 00:23:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:54,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:54,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:23:54,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902559045] [2021-11-21 00:23:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:23:54,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:54,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:54,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:54,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:23:54,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:23:54,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:23:54,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:23:54,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2021-11-21 00:23:55,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:23:55,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:55,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294755022] [2021-11-21 00:23:55,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:23:55,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902559045] [2021-11-21 00:23:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902559045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:23:55,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:23:55,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:23:55,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119517923] [2021-11-21 00:23:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:23:55,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:23:55,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:23:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:23:55,454 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:55,625 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2021-11-21 00:23:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:23:55,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-21 00:23:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:55,633 INFO L225 Difference]: With dead ends: 493 [2021-11-21 00:23:55,634 INFO L226 Difference]: Without dead ends: 390 [2021-11-21 00:23:55,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:23:55,635 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:55,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:23:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-21 00:23:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2021-11-21 00:23:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1841269841269841) internal successors, (373), 315 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2021-11-21 00:23:55,740 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2021-11-21 00:23:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:55,741 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2021-11-21 00:23:55,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:23:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2021-11-21 00:23:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-21 00:23:55,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:55,745 INFO L514 BasicCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:55,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:55,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:23:55,960 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2021-11-21 00:23:55,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051595541] [2021-11-21 00:23:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:55,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:55,975 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:23:55,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175366698] [2021-11-21 00:23:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:23:55,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:56,000 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:56,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:23:56,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:23:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:23:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:23:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2021-11-21 00:23:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:23:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2021-11-21 00:23:56,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:56,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051595541] [2021-11-21 00:23:56,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:23:56,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175366698] [2021-11-21 00:23:56,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175366698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:23:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102058000] [2021-11-21 00:23:56,909 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:23:56,909 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:23:56,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:23:56,910 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:23:56,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:23:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:56,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:57,002 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:23:57,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:23:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:57,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:57,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:23:58,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:58,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:23:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:23:58,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:23:58,524 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:23:58,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:24:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:00,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:02,355 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:24:02,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:24:02,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:03,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:03,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:04,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:24:04,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:04,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:05,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:24:06,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:06,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:06,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:06,886 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:06,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:07,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:07,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:07,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:07,112 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:07,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:24:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:07,307 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:07,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:07,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:07,773 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:24:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:24:07,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:07,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:07,999 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:24:08,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:24:08,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:08,181 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:08,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:08,617 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:08,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:08,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:08,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:08,843 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:08,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:24:09,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:09,144 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:09,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:09,730 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:24:09,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:24:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:10,198 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:24:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:24:10,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:10,612 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:10,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:11,598 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:11,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:11,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:11,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:11,935 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:24:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:12,453 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:12,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:12,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:12,820 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:13,668 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:13,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:13,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:13,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:14,066 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:14,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:24:14,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:14,420 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:14,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:14,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:14,946 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:14,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:15,486 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:24:15,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:24:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:15,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:16,133 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:24:16,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:24:16,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:16,669 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:16,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:16,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:17,051 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:17,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:18,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:18,198 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:24:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:24:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:18,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:18,866 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:24:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:24:19,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:19,572 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:19,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:19,889 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:20,974 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:24:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:24:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:21,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:21,182 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:24:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:24:21,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:21,605 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:21,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:21,764 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:24:23,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:24:23,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:24:23,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-21 00:24:23,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943972525] [2021-11-21 00:24:23,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:24:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:24:23,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:24:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:24:23,206 INFO L87 Difference]: Start difference. First operand 316 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:23,706 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2021-11-21 00:24:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:24:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-21 00:24:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:23,710 INFO L225 Difference]: With dead ends: 493 [2021-11-21 00:24:23,710 INFO L226 Difference]: Without dead ends: 358 [2021-11-21 00:24:23,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:24:23,712 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:23,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 30 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:24:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-21 00:24:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2021-11-21 00:24:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1907692307692308) internal successors, (387), 325 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2021-11-21 00:24:23,850 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2021-11-21 00:24:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:23,850 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2021-11-21 00:24:23,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2021-11-21 00:24:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-21 00:24:23,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:23,853 INFO L514 BasicCegarLoop]: trace histogram [176, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:23,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:24,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:24:24,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2021-11-21 00:24:24,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:24,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433153027] [2021-11-21 00:24:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:24,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:24,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:24:24,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017010910] [2021-11-21 00:24:24,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:24:24,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:24,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:24,098 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:24,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:24:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:24:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:24:24,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2021-11-21 00:24:25,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:24:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2021-11-21 00:24:26,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:26,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433153027] [2021-11-21 00:24:26,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:24:26,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017010910] [2021-11-21 00:24:26,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017010910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:24:26,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104368755] [2021-11-21 00:24:26,678 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:24:26,678 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:24:26,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:24:26,679 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:24:26,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:24:26,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:26,818 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:24:26,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:24:26,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:26,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:24:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:27,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:24:28,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:28,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:28,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:28,428 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:24:28,429 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:24:29,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:29,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:31,865 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:24:31,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 139 [2021-11-21 00:24:32,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:33,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:33,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:24:33,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:34,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:35,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:24:35,233 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:24:35,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:24:35,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:36,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:24:36,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:36,672 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:36,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:36,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:36,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:36,886 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:24:37,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:37,115 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:37,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:37,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:37,526 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:24:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:24:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:37,699 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:24:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 128 [2021-11-21 00:24:37,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:37,818 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:37,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:38,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,207 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:38,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:38,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:38,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:38,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,486 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:24:38,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:38,629 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:39,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:39,073 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:39,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:39,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:39,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:39,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:39,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:39,306 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:39,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:24:39,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:39,647 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:39,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:40,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:40,505 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:24:40,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:24:40,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:40,978 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:24:40,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:24:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:41,306 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:41,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:41,662 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:41,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:42,486 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:24:42,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:24:42,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:42,958 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:24:42,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 141 [2021-11-21 00:24:43,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:43,398 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:43,647 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:44,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:44,207 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:24:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:24:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:44,704 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:24:44,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:24:45,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:45,123 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:45,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:45,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:45,591 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:45,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:46,306 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:24:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:24:46,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:46,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:46,683 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:24:46,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:24:47,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:47,337 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:47,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:47,766 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:47,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:48,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:48,775 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:48,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:48,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:48,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:49,044 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:24:49,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:24:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:24:49,365 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:24:49,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:24:49,512 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:24:50,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:24:50,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:24:50,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-21 00:24:50,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401742144] [2021-11-21 00:24:50,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:24:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-21 00:24:50,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-21 00:24:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1394, Invalid=2266, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 00:24:50,824 INFO L87 Difference]: Start difference. First operand 326 states and 387 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:54,943 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2021-11-21 00:24:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 00:24:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-21 00:24:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:54,954 INFO L225 Difference]: With dead ends: 1739 [2021-11-21 00:24:54,954 INFO L226 Difference]: Without dead ends: 1439 [2021-11-21 00:24:54,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2613, Invalid=4359, Unknown=0, NotChecked=0, Total=6972 [2021-11-21 00:24:54,958 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1584 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:54,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1584 Valid, 140 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:24:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-21 00:24:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2021-11-21 00:24:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1460101867572157) internal successors, (675), 589 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2021-11-21 00:24:55,112 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2021-11-21 00:24:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:55,112 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2021-11-21 00:24:55,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2021-11-21 00:24:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-21 00:24:55,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:55,116 INFO L514 BasicCegarLoop]: trace histogram [368, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:55,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:55,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:55,343 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2021-11-21 00:24:55,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:55,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215298366] [2021-11-21 00:24:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:55,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:55,371 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:24:55,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167929396] [2021-11-21 00:24:55,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:24:55,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:55,372 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:55,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:24:55,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:24:55,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:24:55,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:24:55,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2021-11-21 00:24:56,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:24:56,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215298366] [2021-11-21 00:24:56,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:24:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167929396] [2021-11-21 00:24:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167929396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:24:56,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:24:56,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:24:56,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929890291] [2021-11-21 00:24:56,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:24:56,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:24:56,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:24:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:24:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:24:56,422 INFO L87 Difference]: Start difference. First operand 590 states and 675 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:24:56,660 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2021-11-21 00:24:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:24:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-11-21 00:24:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:24:56,665 INFO L225 Difference]: With dead ends: 765 [2021-11-21 00:24:56,665 INFO L226 Difference]: Without dead ends: 594 [2021-11-21 00:24:56,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:24:56,667 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:24:56,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:24:56,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-21 00:24:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2021-11-21 00:24:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1440677966101696) internal successors, (675), 590 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2021-11-21 00:24:56,864 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2021-11-21 00:24:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:24:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2021-11-21 00:24:56,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:24:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2021-11-21 00:24:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-21 00:24:56,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:24:56,868 INFO L514 BasicCegarLoop]: trace histogram [368, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:24:56,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:24:57,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:24:57,096 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:24:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:24:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2021-11-21 00:24:57,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:24:57,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155904204] [2021-11-21 00:24:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:24:57,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:24:57,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:24:57,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123590264] [2021-11-21 00:24:57,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:24:57,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:24:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:24:57,113 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:24:57,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:24:57,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:24:57,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:24:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:24:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:24:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2021-11-21 00:24:57,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:24:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2021-11-21 00:24:58,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:24:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155904204] [2021-11-21 00:24:58,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:24:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123590264] [2021-11-21 00:24:58,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123590264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:24:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36378559] [2021-11-21 00:24:58,362 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:24:58,362 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:24:58,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:24:58,363 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:24:58,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:24:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:58,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:58,472 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:24:58,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:24:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:24:59,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:59,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:24:59,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:59,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:24:59,993 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:24:59,993 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:25:00,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:01,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:02,879 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:25:02,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:25:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:03,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:04,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:04,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:25:04,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:05,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:05,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:25:06,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:06,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:06,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:06,813 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:25:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:25:06,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:06,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:06,995 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:25:06,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 127 [2021-11-21 00:25:07,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:07,296 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:07,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:07,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:07,748 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:25:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:25:07,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:07,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:07,901 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:25:07,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 128 [2021-11-21 00:25:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:08,117 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:08,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:08,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:08,401 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:08,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:08,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:08,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:08,660 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:25:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:25:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:09,055 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:09,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:09,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:09,524 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:09,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:09,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:09,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:09,836 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:25:09,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:25:10,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:10,064 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:11,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:11,141 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:11,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:11,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:11,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:11,660 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:25:11,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:25:12,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:12,144 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:12,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:12,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:12,659 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:12,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:13,498 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:13,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:13,845 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:25:13,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 154 [2021-11-21 00:25:14,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:14,697 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:14,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:15,118 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:15,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:16,009 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:16,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:16,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:16,222 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:25:16,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:25:16,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:16,880 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:17,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:17,578 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:17,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:18,489 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:18,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:18,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:18,885 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:25:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:25:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:19,581 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:19,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:19,937 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:19,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:21,092 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:21,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:21,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:21,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:21,365 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:25:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:25:21,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:21,703 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:21,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:21,737 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:25:23,004 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:25:23,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:25:23,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-21 00:25:23,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40896108] [2021-11-21 00:25:23,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:25:23,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:25:23,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:25:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:25:23,006 INFO L87 Difference]: Start difference. First operand 591 states and 675 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-11-21 00:25:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:23,525 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2021-11-21 00:25:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:25:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) Word has length 443 [2021-11-21 00:25:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:23,530 INFO L225 Difference]: With dead ends: 1003 [2021-11-21 00:25:23,530 INFO L226 Difference]: Without dead ends: 812 [2021-11-21 00:25:23,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 1308 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:25:23,531 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:23,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:25:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-21 00:25:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2021-11-21 00:25:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.1485148514851484) internal successors, (696), 606 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2021-11-21 00:25:23,732 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2021-11-21 00:25:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:23,732 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2021-11-21 00:25:23,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-11-21 00:25:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2021-11-21 00:25:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-21 00:25:23,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:23,735 INFO L514 BasicCegarLoop]: trace histogram [368, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:25:23,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:25:23,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:25:23,936 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:25:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2021-11-21 00:25:23,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:23,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104560630] [2021-11-21 00:25:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:23,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:23,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:25:23,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561574073] [2021-11-21 00:25:23,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:25:23,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:23,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 00:25:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2565 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 00:25:24,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2021-11-21 00:25:26,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:25:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2021-11-21 00:25:34,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104560630] [2021-11-21 00:25:34,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:25:34,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561574073] [2021-11-21 00:25:34,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561574073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:25:34,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915839996] [2021-11-21 00:25:34,124 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:25:34,124 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:25:34,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:25:34,125 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:25:34,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:34,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:34,193 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-21 00:25:34,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 60 [2021-11-21 00:25:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:34,350 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:25:34,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:25:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:35,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:25:35,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:35,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:35,866 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:25:35,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:25:37,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:37,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:39,768 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:25:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 139 [2021-11-21 00:25:40,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:40,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:41,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:25:41,528 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:25:41,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:25:41,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:42,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:43,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:25:43,287 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:25:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:25:43,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:43,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:25:44,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:44,461 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:25:44,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:25:44,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:45,047 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:25:45,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 137 [2021-11-21 00:25:45,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:45,401 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:46,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:46,019 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:25:46,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:25:46,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:46,202 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:25:46,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:25:46,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:46,377 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:46,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:46,830 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:46,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:46,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:46,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:47,075 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:25:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:25:47,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:47,522 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:47,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:48,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:48,122 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:25:48,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:25:48,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:48,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:48,652 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:25:48,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:25:49,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:49,147 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:50,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:50,177 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:50,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:50,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:50,923 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:25:50,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:25:51,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:51,636 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:52,168 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:52,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:53,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:53,061 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:53,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:53,701 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:25:53,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 141 [2021-11-21 00:25:54,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:54,537 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:54,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:54,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:55,046 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:55,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:55,834 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:25:55,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:25:56,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:56,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:56,105 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:25:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:25:56,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:56,753 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:56,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:57,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:57,369 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:57,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:58,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:58,325 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:58,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:58,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:25:58,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:58,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:58,716 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:25:58,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:25:59,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:59,569 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:59,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:25:59,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:25:59,874 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:25:59,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:26:01,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:01,154 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:26:01,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:26:01,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:01,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:01,372 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:26:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:26:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:01,902 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:26:01,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:26:02,042 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:26:03,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:26:03,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:26:03,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-21 00:26:03,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411886994] [2021-11-21 00:26:03,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:26:03,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-21 00:26:03,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-21 00:26:03,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5018, Invalid=6754, Unknown=0, NotChecked=0, Total=11772 [2021-11-21 00:26:03,660 INFO L87 Difference]: Start difference. First operand 607 states and 696 transitions. Second operand has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:26:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:33,380 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2021-11-21 00:26:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-21 00:26:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2021-11-21 00:26:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:33,403 INFO L225 Difference]: With dead ends: 4184 [2021-11-21 00:26:33,403 INFO L226 Difference]: Without dead ends: 3627 [2021-11-21 00:26:33,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1256 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6801 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=9765, Invalid=14415, Unknown=0, NotChecked=0, Total=24180 [2021-11-21 00:26:33,413 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3642 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 2010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3642 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2010 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:33,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3642 Valid, 284 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2010 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-21 00:26:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2021-11-21 00:26:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2021-11-21 00:26:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.1216931216931216) internal successors, (1272), 1134 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:26:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2021-11-21 00:26:33,795 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2021-11-21 00:26:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:33,795 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2021-11-21 00:26:33,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:26:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2021-11-21 00:26:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-11-21 00:26:33,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:33,804 INFO L514 BasicCegarLoop]: trace histogram [752, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:26:33,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:26:34,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:34,031 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2021-11-21 00:26:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:34,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410662651] [2021-11-21 00:26:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:34,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:34,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:26:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246009945] [2021-11-21 00:26:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:26:34,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:34,069 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:34,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 00:26:34,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:26:34,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:26:34,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:26:34,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2021-11-21 00:26:38,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:26:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2021-11-21 00:26:46,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:46,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410662651] [2021-11-21 00:26:46,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:26:46,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246009945] [2021-11-21 00:26:46,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246009945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:26:46,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232956074] [2021-11-21 00:26:46,952 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:26:46,952 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:26:46,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:26:46,953 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:26:46,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:26:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:47,092 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:26:47,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:26:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:47,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:26:48,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:26:48,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:48,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:48,907 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:26:48,907 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:26:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:50,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:52,690 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:26:52,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:26:53,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:53,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:54,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:54,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:54,795 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 108 treesize of output 86 [2021-11-21 00:26:55,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:56,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:56,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:26:57,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:26:57,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:26:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:58,513 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:26:58,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:26:58,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:58,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:58,714 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:26:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 137 [2021-11-21 00:26:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:59,156 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:26:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:26:59,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:26:59,888 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:26:59,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:27:00,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:00,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:00,241 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:27:00,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:27:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:00,418 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:00,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:01,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:01,285 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:27:01,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:27:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:01,796 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:27:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:27:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:02,397 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:02,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:03,345 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:27:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:27:03,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:04,200 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:27:04,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:27:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:04,573 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:04,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:05,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:05,660 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:27:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:27:06,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:06,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:06,379 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-21 00:27:06,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 160 [2021-11-21 00:27:07,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:07,174 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:07,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:07,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:08,014 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:08,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:09,391 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:09,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:09,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:09,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:09,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:09,879 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:09,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:27:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:10,821 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:10,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:11,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:11,447 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:11,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:12,225 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:12,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:12,683 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:12,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:27:13,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:13,520 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:13,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:14,030 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:14,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:15,267 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:15,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:15,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:15,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:15,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:15,760 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:15,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:27:16,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:16,747 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:16,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:17,533 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:17,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:19,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:19,596 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:19,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:19,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:19,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:19,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:20,152 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:20,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:27:20,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:20,603 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:20,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:21,024 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:27:22,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:27:22,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:27:22,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 00:27:22,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784695884] [2021-11-21 00:27:22,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:27:22,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:27:22,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:27:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:27:22,960 INFO L87 Difference]: Start difference. First operand 1135 states and 1272 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:23,468 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2021-11-21 00:27:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:27:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 839 [2021-11-21 00:27:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:23,476 INFO L225 Difference]: With dead ends: 1449 [2021-11-21 00:27:23,476 INFO L226 Difference]: Without dead ends: 1139 [2021-11-21 00:27:23,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 2500 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:27:23,481 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:23,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-21 00:27:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2021-11-21 00:27:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1135 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2021-11-21 00:27:23,956 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2021-11-21 00:27:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:23,957 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2021-11-21 00:27:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2021-11-21 00:27:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2021-11-21 00:27:23,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:23,968 INFO L514 BasicCegarLoop]: trace histogram [752, 13, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:24,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:27:24,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:27:24,183 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2021-11-21 00:27:24,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271019485] [2021-11-21 00:27:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:24,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:24,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:27:24,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158333621] [2021-11-21 00:27:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:27:24,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:27:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:27:24,215 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:27:24,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 00:27:24,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:27:24,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:27:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:27:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:27:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2021-11-21 00:27:25,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:27:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2021-11-21 00:27:27,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:27,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271019485] [2021-11-21 00:27:27,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:27:27,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158333621] [2021-11-21 00:27:27,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158333621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:27:27,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534031437] [2021-11-21 00:27:27,020 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:27:27,020 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:27:27,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:27:27,021 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:27:27,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:27:27,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:27,143 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:27:27,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:27:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:27:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:28,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-21 00:27:28,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:28,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:29,001 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-21 00:27:29,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 320 [2021-11-21 00:27:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:31,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:33,382 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-21 00:27:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 139 [2021-11-21 00:27:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:34,477 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 37 treesize of output 33 [2021-11-21 00:27:35,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:35,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:35,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:27:36,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:36,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:38,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:27:38,435 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:27:38,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:27:38,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:27:39,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:39,719 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:39,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:39,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:40,051 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:40,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:27:40,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:40,335 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:40,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:40,935 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:27:40,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:27:41,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:41,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:41,199 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:27:41,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 118 [2021-11-21 00:27:41,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:41,415 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:41,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:42,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:42,279 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:27:42,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:27:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:42,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:42,948 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:27:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:27:43,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:43,607 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:44,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:44,545 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:44,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:44,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:45,206 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:45,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:27:45,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:45,712 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:47,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:47,638 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:27:47,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:27:48,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:48,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:48,899 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:27:48,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:27:49,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:49,999 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:50,710 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:50,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:51,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:52,025 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:52,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:52,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:52,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:52,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:52,487 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:52,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:27:53,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:53,249 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:53,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:54,021 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:55,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:55,251 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:55,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:55,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:27:55,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:55,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:55,922 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:27:55,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:27:56,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:57,062 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:57,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:57,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:57,895 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:27:59,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:27:59,595 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:27:59,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:28:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:00,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:00,407 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:28:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:28:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:01,169 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:28:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:28:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:01,631 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:28:01,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:28:03,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:03,301 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:28:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:28:03,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:03,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:03,658 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-21 00:28:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 121 [2021-11-21 00:28:04,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:28:04,297 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:28:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:28:04,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:28:06,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:28:06,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:28:06,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-21 00:28:06,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507425723] [2021-11-21 00:28:06,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:28:06,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:28:06,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:28:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:28:06,050 INFO L87 Difference]: Start difference. First operand 1136 states and 1270 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 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) [2021-11-21 00:28:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:28:07,810 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2021-11-21 00:28:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:28:07,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 844 [2021-11-21 00:28:07,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:28:07,821 INFO L225 Difference]: With dead ends: 1567 [2021-11-21 00:28:07,821 INFO L226 Difference]: Without dead ends: 1198 [2021-11-21 00:28:07,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 2506 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 00:28:07,824 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:28:07,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 41 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:28:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-21 00:28:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2021-11-21 00:28:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 1.1267241379310344) internal successors, (1307), 1160 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:28:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2021-11-21 00:28:08,172 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2021-11-21 00:28:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:28:08,173 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2021-11-21 00:28:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 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) [2021-11-21 00:28:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2021-11-21 00:28:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-11-21 00:28:08,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:28:08,182 INFO L514 BasicCegarLoop]: trace histogram [752, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:28:08,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:28:08,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:28:08,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:28:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:28:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2021-11-21 00:28:08,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:08,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563830302] [2021-11-21 00:28:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:08,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:08,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:28:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713318655] [2021-11-21 00:28:08,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:28:08,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:28:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:28:08,437 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:28:08,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d06cc5-cbfd-4336-bd5c-d2d7c8ae4324/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 00:28:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:09,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 4905 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-21 00:28:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:28:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2021-11-21 00:28:14,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:30:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2021-11-21 00:30:15,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:30:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563830302] [2021-11-21 00:30:15,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:30:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713318655] [2021-11-21 00:30:15,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713318655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:30:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1757965640] [2021-11-21 00:30:15,561 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 00:30:15,561 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:30:15,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:30:15,562 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:30:15,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:30:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:15,734 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:30:15,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:30:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:15,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-21 00:30:17,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:17,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2021-11-21 00:30:17,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:17,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:17,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:17,742 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-21 00:30:17,743 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 3 case distinctions, treesize of input 342 treesize of output 318 [2021-11-21 00:30:19,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:22,341 INFO L354 Elim1Store]: treesize reduction 116, result has 11.5 percent of original size [2021-11-21 00:30:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 143 [2021-11-21 00:30:23,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:23,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:24,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:24,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2021-11-21 00:30:24,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:25,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:26,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 00:30:28,493 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-21 00:30:28,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-21 00:30:29,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:30,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-21 00:30:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:30,627 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:30,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:30,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:31,118 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:30:31,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 121 [2021-11-21 00:30:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:31,662 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:31,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:32,484 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:32,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:32,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:32,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:32,744 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:30:32,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 112 [2021-11-21 00:30:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:33,082 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:33,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:34,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:34,124 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:30:34,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:30:34,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:34,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:34,365 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:30:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:30:34,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:34,770 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:34,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:35,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:35,706 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-21 00:30:35,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 00:30:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:35,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:36,405 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-21 00:30:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 131 [2021-11-21 00:30:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:37,044 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:38,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:38,273 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:38,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:38,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:38,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:38,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:38,754 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:30:38,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:30:39,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:39,387 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:39,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:40,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:40,235 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:40,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:41,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:41,839 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:41,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:42,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:42,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:42,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:42,261 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:30:42,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 125 [2021-11-21 00:30:43,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:43,270 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:43,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:44,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:44,161 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:44,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:44,945 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-21 00:30:44,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-21 00:30:45,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:45,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:46,054 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-21 00:30:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 147 [2021-11-21 00:30:46,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:46,853 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:46,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:47,432 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:47,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:48,916 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:48,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:49,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:49,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:49,365 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:30:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 131 [2021-11-21 00:30:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:50,572 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:51,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:51,331 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:51,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:53,607 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:53,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:53,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:30:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:54,036 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-21 00:30:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-21 00:30:54,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:30:54,650 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-21 00:30:54,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-21 00:30:54,988 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:30:57,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:30:57,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:30:57,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-21 00:30:57,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352369509] [2021-11-21 00:30:57,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:30:57,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-21 00:30:57,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:30:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-21 00:30:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19178, Invalid=22642, Unknown=0, NotChecked=0, Total=41820 [2021-11-21 00:30:57,658 INFO L87 Difference]: Start difference. First operand 1161 states and 1307 transitions. Second operand has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)