./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8 --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 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:12:01,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:12:01,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:12:01,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:12:01,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:12:01,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:12:01,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:12:01,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:12:01,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:12:01,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:12:01,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:12:01,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:12:01,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:12:01,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:12:01,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:12:01,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:12:01,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:12:01,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:12:01,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:12:01,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:12:01,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:12:01,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:12:01,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:12:01,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:12:01,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:12:01,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:12:01,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:12:01,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:12:01,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:12:01,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:12:01,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:12:01,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:12:01,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:12:01,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:12:01,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:12:01,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:12:01,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:12:01,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:12:01,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:12:01,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:12:01,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:12:01,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:12:01,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:12:01,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:12:01,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:12:01,604 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:12:01,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:12:01,604 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:12:01,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:12:01,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:12:01,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:12:01,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:12:01,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:12:01,613 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:12:01,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:12:01,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:12:01,614 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:12:01,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:12:01,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:12:01,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:12:01,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:12:01,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:12:01,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:12:01,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:12:01,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:12:01,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:12:01,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:12:01,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:12:01,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:12:01,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:12:01,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:12:01,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:12:01,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:01,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:12:01,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:12:01,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:12:01,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:12:01,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:12:01,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:12:01,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:12:01,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:12:01,622 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_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2021-11-07 02:12:01,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:12:01,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:12:01,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:12:01,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:12:01,900 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:12:01,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-11-07 02:12:01,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/data/145444cbc/60285324a60040f98dc570d7c62f8e2d/FLAG56fb06be1 [2021-11-07 02:12:02,496 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:12:02,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-11-07 02:12:02,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/data/145444cbc/60285324a60040f98dc570d7c62f8e2d/FLAG56fb06be1 [2021-11-07 02:12:02,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/data/145444cbc/60285324a60040f98dc570d7c62f8e2d [2021-11-07 02:12:02,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:12:02,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:12:02,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:02,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:12:02,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:12:02,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:02" (1/1) ... [2021-11-07 02:12:02,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0054ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:02, skipping insertion in model container [2021-11-07 02:12:02,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:02" (1/1) ... [2021-11-07 02:12:02,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:12:02,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:03,076 WARN L228 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_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2021-11-07 02:12:03,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:03,102 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:12:03,119 WARN L228 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_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2021-11-07 02:12:03,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:03,136 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:12:03,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03 WrapperNode [2021-11-07 02:12:03,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:03,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:12:03,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:12:03,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:12:03,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:12:03,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:12:03,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:12:03,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:12:03,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:12:03,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:12:03,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:12:03,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:12:03,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (1/1) ... [2021-11-07 02:12:03,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:03,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:03,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:12:03,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:12:03,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:12:03,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:12:03,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:12:03,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:12:03,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:12:03,563 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 02:12:03,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:03 BoogieIcfgContainer [2021-11-07 02:12:03,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:12:03,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:12:03,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:12:03,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:12:03,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:12:02" (1/3) ... [2021-11-07 02:12:03,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d18f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:03, skipping insertion in model container [2021-11-07 02:12:03,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:03" (2/3) ... [2021-11-07 02:12:03,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d18f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:03, skipping insertion in model container [2021-11-07 02:12:03,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:03" (3/3) ... [2021-11-07 02:12:03,577 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2021-11-07 02:12:03,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:12:03,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:12:03,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:12:03,703 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 [2021-11-07 02:12:03,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:12:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 02:12:03,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:03,727 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 02:12:03,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 73603151, now seen corresponding path program 1 times [2021-11-07 02:12:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:03,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804205125] [2021-11-07 02:12:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:03,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:03,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:03,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804205125] [2021-11-07 02:12:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804205125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:03,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:03,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 02:12:03,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931577346] [2021-11-07 02:12:03,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:03,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:04,000 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:04,027 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-07 02:12:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:04,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 02:12:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:04,037 INFO L225 Difference]: With dead ends: 15 [2021-11-07 02:12:04,038 INFO L226 Difference]: Without dead ends: 7 [2021-11-07 02:12:04,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-07 02:12:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-07 02:12:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2021-11-07 02:12:04,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2021-11-07 02:12:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:04,083 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-11-07 02:12:04,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2021-11-07 02:12:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:12:04,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:04,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:12:04,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:12:04,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2011378392, now seen corresponding path program 1 times [2021-11-07 02:12:04,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:04,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687337844] [2021-11-07 02:12:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:04,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:04,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:04,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687337844] [2021-11-07 02:12:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687337844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:04,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538943373] [2021-11-07 02:12:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:04,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:04,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:12:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:12:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:04,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:04,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538943373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:04,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40937240] [2021-11-07 02:12:04,604 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:04,605 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:04,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:04,617 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:04,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:04,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,670 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:04,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:04,679 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:04,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:04,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:04,713 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-07 02:12:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:04,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:04,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:04,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:04,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:04,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:04,801 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:04,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:04,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:04,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:04,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:04,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:04,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:04,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:04,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:04,865 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:04,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:04,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:04,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:04,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,038 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:05,050 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 433 [2021-11-07 02:12:05,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-07 02:12:05,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,312 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.2 percent of original size [2021-11-07 02:12:05,318 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,321 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:05,329 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,330 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 02:12:05,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 02:12:05,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:05,397 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:05,408 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:05,416 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:05,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:05,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:05,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:05,439 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [40937240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:05,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:05,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2021-11-07 02:12:05,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762617268] [2021-11-07 02:12:05,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:05,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:05,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:05,617 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:05,632 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-11-07 02:12:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:12:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:12:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:05,633 INFO L225 Difference]: With dead ends: 11 [2021-11-07 02:12:05,633 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 02:12:05,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 02:12:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 02:12:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2021-11-07 02:12:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-07 02:12:05,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-07 02:12:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:05,637 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-07 02:12:05,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-07 02:12:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:12:05,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:05,638 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:05,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:05,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-07 02:12:05,865 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2071138276, now seen corresponding path program 1 times [2021-11-07 02:12:05,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:05,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614032210] [2021-11-07 02:12:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:05,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:05,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:05,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614032210] [2021-11-07 02:12:05,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614032210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:05,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865439683] [2021-11-07 02:12:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:05,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:05,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:05,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 02:12:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:12:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:06,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:06,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865439683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:06,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168134763] [2021-11-07 02:12:06,108 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:06,108 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:06,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:06,109 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:06,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:06,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,122 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:06,130 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:06,132 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:06,144 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-07 02:12:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:06,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:06,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:06,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:06,210 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:06,211 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:06,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:06,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:06,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:06,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:06,229 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:06,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:06,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,284 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,289 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,290 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:06,294 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 433 [2021-11-07 02:12:06,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-07 02:12:06,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,438 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.2 percent of original size [2021-11-07 02:12:06,442 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:06,447 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 02:12:06,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 02:12:06,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,494 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:06,496 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:06,502 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:06,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:06,506 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:06,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:06,521 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:12:06,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:12:06,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,563 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:12:06,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:12:06,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:06,609 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:12:06,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:06,616 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:06,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:06,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:06,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-07 02:12:06,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856943342] [2021-11-07 02:12:06,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:12:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:06,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:12:06,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:12:06,954 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:06,971 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-07 02:12:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:12:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 02:12:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:06,972 INFO L225 Difference]: With dead ends: 16 [2021-11-07 02:12:06,972 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 02:12:06,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:12:06,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 02:12:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 02:12:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-07 02:12:06,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-11-07 02:12:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:06,977 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-07 02:12:06,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-07 02:12:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 02:12:06,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:06,978 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:07,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:07,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash -215940259, now seen corresponding path program 2 times [2021-11-07 02:12:07,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:07,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653954453] [2021-11-07 02:12:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:07,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:07,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:07,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653954453] [2021-11-07 02:12:07,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653954453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:07,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209953423] [2021-11-07 02:12:07,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:12:07,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:07,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:07,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:07,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 02:12:07,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 02:12:07,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:12:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:07,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:07,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209953423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:07,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555810516] [2021-11-07 02:12:07,651 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:07,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:07,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:07,651 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:07,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:07,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,663 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:07,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,664 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:07,666 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:07,667 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:07,670 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:07,674 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-07 02:12:07,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:07,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:07,690 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:07,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:07,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:07,727 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:07,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:07,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,732 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:07,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:07,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:07,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:07,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:07,771 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:07,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:07,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,844 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:07,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:07,851 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:07,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 02:12:07,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-07 02:12:07,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,970 INFO L180 QuantifierPusher]: treesize reduction 42, result has 65.0 percent of original size [2021-11-07 02:12:07,977 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:07,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:07,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:07,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:07,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:07,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,011 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:08,015 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:08,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:08,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:08,019 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:08,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:08,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:08,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:08,037 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:12:08,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:12:08,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,074 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:12:08,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:12:08,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:08,109 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:12:08,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:08,117 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:08,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:08,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:08,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-07 02:12:08,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010747738] [2021-11-07 02:12:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:12:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:12:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:12:08,471 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:08,524 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-07 02:12:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:12:08,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 02:12:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:08,526 INFO L225 Difference]: With dead ends: 22 [2021-11-07 02:12:08,526 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 02:12:08,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:12:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 02:12:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 02:12:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-07 02:12:08,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2021-11-07 02:12:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:08,534 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-07 02:12:08,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-07 02:12:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:12:08,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:08,535 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:08,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:08,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:08,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:08,750 INFO L85 PathProgramCache]: Analyzing trace with hash -67181059, now seen corresponding path program 3 times [2021-11-07 02:12:08,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:08,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841416809] [2021-11-07 02:12:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:08,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:08,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:08,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841416809] [2021-11-07 02:12:08,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841416809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:08,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796638679] [2021-11-07 02:12:08,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:12:08,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:08,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:08,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:08,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 02:12:08,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:12:08,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:12:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:09,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:09,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796638679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:09,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952526372] [2021-11-07 02:12:09,652 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:09,652 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:09,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:09,653 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:09,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:09,662 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,662 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,663 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:09,664 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:09,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:09,670 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-07 02:12:09,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:09,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:09,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:09,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:09,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:09,702 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:09,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:09,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:09,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:09,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:09,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:09,713 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:09,717 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:09,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:09,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,768 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:09,774 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 438 [2021-11-07 02:12:09,820 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 486 [2021-11-07 02:12:09,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,893 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.2 percent of original size [2021-11-07 02:12:09,895 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:09,900 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 02:12:09,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 02:12:09,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,929 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:09,931 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:09,934 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:09,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:09,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:09,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:09,948 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:12:09,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:12:09,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,977 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:12:09,981 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:12:09,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:09,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:10,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:10,007 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:12:10,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:10,017 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:10,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:10,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:10,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-07 02:12:10,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928172833] [2021-11-07 02:12:10,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 02:12:10,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 02:12:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=500, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:12:10,324 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:10,370 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-07 02:12:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 02:12:10,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 02:12:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:10,371 INFO L225 Difference]: With dead ends: 34 [2021-11-07 02:12:10,371 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 02:12:10,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=500, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:12:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 02:12:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-07 02:12:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2021-11-07 02:12:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-07 02:12:10,378 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 16 [2021-11-07 02:12:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:10,378 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-07 02:12:10,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-07 02:12:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:12:10,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:10,379 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:10,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:10,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 02:12:10,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash -565230787, now seen corresponding path program 4 times [2021-11-07 02:12:10,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:10,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145441724] [2021-11-07 02:12:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:11,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:11,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145441724] [2021-11-07 02:12:11,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145441724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:11,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227235894] [2021-11-07 02:12:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:12:11,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:11,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:11,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 02:12:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 02:12:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:11,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:12,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227235894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:12,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18244375] [2021-11-07 02:12:12,756 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:12,757 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:12,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:12,757 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:12,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:12,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,762 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,763 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:12,764 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,766 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:12,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:12,770 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-07 02:12:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:12,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:12,781 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:12,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:12,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:12,801 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:12,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:12,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,805 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:12,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:12,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:12,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:12,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:12,814 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:12,816 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:12,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,866 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,869 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:12,869 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,871 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,887 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 433 [2021-11-07 02:12:12,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-07 02:12:12,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,956 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.2 percent of original size [2021-11-07 02:12:12,958 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:12,962 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 02:12:12,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 02:12:12,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:12,989 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:12,991 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:12,994 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:12,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:12,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:12,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:13,005 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:12:13,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:12:13,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,032 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:12:13,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:12:13,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:13,059 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:12:13,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:13,067 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:13,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:13,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:13,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-07 02:12:13,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462591360] [2021-11-07 02:12:13,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 02:12:13,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:13,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 02:12:13,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1568, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 02:12:13,412 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:13,506 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2021-11-07 02:12:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 02:12:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 02:12:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:13,508 INFO L225 Difference]: With dead ends: 58 [2021-11-07 02:12:13,508 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 02:12:13,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1188, Invalid=1568, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 02:12:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 02:12:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-07 02:12:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-07 02:12:13,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 28 [2021-11-07 02:12:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:13,521 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-07 02:12:13,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-07 02:12:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:12:13,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:13,524 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:13,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:13,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:13,749 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1927651907, now seen corresponding path program 5 times [2021-11-07 02:12:13,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:13,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316171185] [2021-11-07 02:12:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:13,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:15,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:15,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316171185] [2021-11-07 02:12:15,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316171185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:15,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879214628] [2021-11-07 02:12:15,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:12:15,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:15,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:15,009 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 02:12:15,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-07 02:12:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 02:12:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:15,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:19,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879214628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:19,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310932664] [2021-11-07 02:12:19,886 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:19,886 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:19,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:19,886 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:19,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:19,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,891 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:19,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:19,893 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:19,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,894 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:19,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:19,898 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-07 02:12:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:19,910 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:19,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:19,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:19,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:19,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:19,935 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:19,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:19,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,947 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:19,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:19,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:19,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:19,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:19,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:19,955 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:19,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:19,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:19,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:19,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:19,994 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:19,996 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:19,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:20,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:20,004 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:20,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:20,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 02:12:20,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-07 02:12:20,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,082 INFO L180 QuantifierPusher]: treesize reduction 42, result has 65.0 percent of original size [2021-11-07 02:12:20,085 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:20,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:20,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:20,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:20,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,127 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:20,128 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:20,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:20,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:20,132 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:20,132 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:20,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:20,137 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:20,141 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:12:20,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:12:20,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,166 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:12:20,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:12:20,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:20,193 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:12:20,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:20,198 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:20,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:20,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:20,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-07 02:12:20,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816090202] [2021-11-07 02:12:20,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 02:12:20,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 02:12:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5432, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 02:12:20,573 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 96 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) [2021-11-07 02:12:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:20,827 INFO L93 Difference]: Finished difference Result 106 states and 155 transitions. [2021-11-07 02:12:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 02:12:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 96 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:12:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:20,834 INFO L225 Difference]: With dead ends: 106 [2021-11-07 02:12:20,835 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 02:12:20,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4668, Invalid=5432, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 02:12:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 02:12:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-07 02:12:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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) [2021-11-07 02:12:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-07 02:12:20,868 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 52 [2021-11-07 02:12:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:20,869 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-07 02:12:20,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 96 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) [2021-11-07 02:12:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-07 02:12:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:12:20,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:20,874 INFO L513 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:20,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:21,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-11-07 02:12:21,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:21,099 INFO L85 PathProgramCache]: Analyzing trace with hash -702934339, now seen corresponding path program 6 times [2021-11-07 02:12:21,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:21,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045312773] [2021-11-07 02:12:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:21,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:24,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:24,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045312773] [2021-11-07 02:12:24,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045312773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:24,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52361667] [2021-11-07 02:12:24,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:12:24,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:24,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:24,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:24,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 02:12:25,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:12:25,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:25,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 02:12:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:25,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:38,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52361667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:38,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144009247] [2021-11-07 02:12:38,594 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:12:38,595 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:12:38,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:12:38,595 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:12:38,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:12:38,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:12:38,605 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:12:38,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:12:38,610 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-07 02:12:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:12:38,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:38,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,622 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:12:38,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:38,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:12:38,647 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:12:38,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:38,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:12:38,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:12:38,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:38,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:12:38,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:12:38,661 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:12:38,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:12:38,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,706 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,706 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:38,709 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 433 [2021-11-07 02:12:38,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 490 [2021-11-07 02:12:38,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,803 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.2 percent of original size [2021-11-07 02:12:38,804 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:38,807 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 02:12:38,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 02:12:38,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,833 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:12:38,834 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:12:38,837 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:12:38,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:12:38,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:12:38,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:12:38,848 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:12:38,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:12:38,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,878 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:12:38,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:12:38,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:12:38,907 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:12:38,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:12:38,913 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:12:39,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:12:39,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:39,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-07 02:12:39,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365736298] [2021-11-07 02:12:39,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-07 02:12:39,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:12:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-07 02:12:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20072, Unknown=0, NotChecked=0, Total=38612 [2021-11-07 02:12:39,465 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 192 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:40,185 INFO L93 Difference]: Finished difference Result 202 states and 299 transitions. [2021-11-07 02:12:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-07 02:12:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 192 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 02:12:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:40,192 INFO L225 Difference]: With dead ends: 202 [2021-11-07 02:12:40,193 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 02:12:40,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=18540, Invalid=20072, Unknown=0, NotChecked=0, Total=38612 [2021-11-07 02:12:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 02:12:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-07 02:12:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-07 02:12:40,257 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 100 [2021-11-07 02:12:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:40,260 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-07 02:12:40,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 192 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-07 02:12:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-07 02:12:40,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:40,271 INFO L513 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:40,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:40,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-11-07 02:12:40,492 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1807711421, now seen corresponding path program 7 times [2021-11-07 02:12:40,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:12:40,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364403138] [2021-11-07 02:12:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:40,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:12:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18146 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:53,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:12:53,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364403138] [2021-11-07 02:12:53,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364403138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:53,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165621998] [2021-11-07 02:12:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:12:53,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:53,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:53,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 02:12:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 02:12:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18146 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:55,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18146 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:36,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165621998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:36,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680313056] [2021-11-07 02:13:36,372 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:13:36,372 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:13:36,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:13:36,373 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:13:36,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:13:36,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,377 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:13:36,378 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:13:36,380 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:13:36,382 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-07 02:13:36,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:13:36,390 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:13:36,390 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:13:36,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:13:36,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:13:36,415 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:13:36,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:13:36,418 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:13:36,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:13:36,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:13:36,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:13:36,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:13:36,428 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:13:36,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:13:36,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,469 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,469 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:13:36,472 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,474 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-07 02:13:36,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-07 02:13:36,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,559 INFO L180 QuantifierPusher]: treesize reduction 42, result has 65.0 percent of original size [2021-11-07 02:13:36,560 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:13:36,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:13:36,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,584 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:13:36,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:13:36,589 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:13:36,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:13:36,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:13:36,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:13:36,597 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:13:36,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:13:36,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,621 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:13:36,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:13:36,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:13:36,645 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:13:36,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:13:36,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:13:37,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:13:37,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:13:37,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-07 02:13:37,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994164010] [2021-11-07 02:13:37,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-07 02:13:37,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:13:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-07 02:13:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73932, Invalid=77000, Unknown=0, NotChecked=0, Total=150932 [2021-11-07 02:13:37,408 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0129870129870129) internal successors, (390), 384 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:39,523 INFO L93 Difference]: Finished difference Result 394 states and 587 transitions. [2021-11-07 02:13:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-07 02:13:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0129870129870129) internal successors, (390), 384 states have internal predecessors, (390), 0 states have call successors, (0), 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 196 [2021-11-07 02:13:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:39,528 INFO L225 Difference]: With dead ends: 394 [2021-11-07 02:13:39,528 INFO L226 Difference]: Without dead ends: 389 [2021-11-07 02:13:39,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=73932, Invalid=77000, Unknown=0, NotChecked=0, Total=150932 [2021-11-07 02:13:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-07 02:13:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2021-11-07 02:13:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-07 02:13:39,591 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 196 [2021-11-07 02:13:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:39,591 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-07 02:13:39,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0129870129870129) internal successors, (390), 384 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-07 02:13:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-11-07 02:13:39,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:39,600 INFO L513 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:39,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:39,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:39,821 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:39,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1436700861, now seen corresponding path program 8 times [2021-11-07 02:13:39,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:39,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805934232] [2021-11-07 02:13:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:39,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:13:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 73154 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:32,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:32,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805934232] [2021-11-07 02:14:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805934232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:32,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520850707] [2021-11-07 02:14:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:14:32,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:32,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:32,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 02:14:39,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2021-11-07 02:14:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-07 02:14:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 73154 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:42,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 73154 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:17:18,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520850707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:18,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329950297] [2021-11-07 02:17:18,131 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 02:17:18,131 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 02:17:18,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 02:17:18,132 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 02:17:18,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 02:17:18,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,134 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 02:17:18,135 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 02:17:18,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-07 02:17:18,138 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-11-07 02:17:18,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 02:17:18,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:17:18,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 02:17:18,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 02:17:18,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:17:18,165 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 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 02:17:18,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:17:18,167 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 02:17:18,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 02:17:18,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:17:18,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 02:17:18,174 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:100 [2021-11-07 02:17:18,175 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-11-07 02:17:18,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 100 [2021-11-07 02:17:18,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,209 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:17:18,212 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 438 [2021-11-07 02:17:18,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 486 [2021-11-07 02:17:18,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,289 INFO L180 QuantifierPusher]: treesize reduction 36, result has 69.2 percent of original size [2021-11-07 02:17:18,290 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:17:18,293 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-11-07 02:17:18,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 02:17:18,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,315 INFO L180 QuantifierPusher]: treesize reduction 36, result has 68.4 percent of original size [2021-11-07 02:17:18,316 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 02:17:18,319 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 02:17:18,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:17:18,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-07 02:17:18,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:17:18,326 INFO L180 QuantifierPusher]: treesize reduction 40, result has 56.0 percent of original size [2021-11-07 02:17:18,327 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-07 02:17:18,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,355 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.9 percent of original size [2021-11-07 02:17:18,357 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 02:17:18,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:17:18,375 INFO L180 QuantifierPusher]: treesize reduction 36, result has 55.6 percent of original size [2021-11-07 02:17:18,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 02:17:18,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 02:17:19,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:17:19,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:17:19,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2021-11-07 02:17:19,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282450359] [2021-11-07 02:17:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-11-07 02:17:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:17:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-11-07 02:17:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295308, Invalid=301448, Unknown=0, NotChecked=0, Total=596756 [2021-11-07 02:17:19,736 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 769 states, 769 states have (on average 1.0065019505851756) internal successors, (774), 768 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:32,161 INFO L93 Difference]: Finished difference Result 778 states and 1163 transitions. [2021-11-07 02:17:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-07 02:17:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 1.0065019505851756) internal successors, (774), 768 states have internal predecessors, (774), 0 states have call successors, (0), 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 388 [2021-11-07 02:17:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:32,167 INFO L225 Difference]: With dead ends: 778 [2021-11-07 02:17:32,167 INFO L226 Difference]: Without dead ends: 773 [2021-11-07 02:17:32,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6125 ImplicationChecksByTransitivity, 194.8s TimeCoverageRelationStatistics Valid=295308, Invalid=301448, Unknown=0, NotChecked=0, Total=596756 [2021-11-07 02:17:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-07 02:17:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 773. [2021-11-07 02:17:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.0025906735751295) internal successors, (774), 772 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 774 transitions. [2021-11-07 02:17:32,259 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 774 transitions. Word has length 388 [2021-11-07 02:17:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:32,260 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 774 transitions. [2021-11-07 02:17:32,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 1.0065019505851756) internal successors, (774), 768 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 774 transitions. [2021-11-07 02:17:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-11-07 02:17:32,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:32,288 INFO L513 BasicCegarLoop]: trace histogram [766, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:32,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:32,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-11-07 02:17:32,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1547175747, now seen corresponding path program 9 times [2021-11-07 02:17:32,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:17:32,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123673886] [2021-11-07 02:17:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:32,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:17:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 293762 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:21:10,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:21:10,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123673886] [2021-11-07 02:21:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123673886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:21:10,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362197256] [2021-11-07 02:21:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:21:10,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:10,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:10,945 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:21:10,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab8a724f-5a64-47ad-bdbd-ab2aec76c7a8/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 02:21:45,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:21:45,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:21:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 768 conjunts are in the unsatisfiable core [2021-11-07 02:21:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 293762 backedges. 0 proven. 293761 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:21:49,460 INFO L328 TraceCheckSpWp]: Computing backward predicates...