./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:16:17,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:16:17,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:16:17,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:16:17,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:16:17,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:16:17,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:16:17,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:16:17,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:16:17,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:16:17,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:16:17,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:16:17,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:16:17,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:16:17,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:16:17,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:16:17,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:16:17,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:16:17,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:16:17,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:16:17,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:16:17,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:16:17,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:16:17,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:16:17,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:16:17,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:16:17,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:16:17,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:16:17,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:16:17,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:16:17,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:16:17,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:16:17,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:16:17,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:16:17,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:16:17,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:16:17,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:16:17,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:16:17,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:16:17,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:16:17,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:16:17,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:16:17,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:16:17,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:16:17,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:16:17,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:16:17,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:16:17,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:16:17,686 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:16:17,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:16:17,686 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:16:17,686 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:16:17,687 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:16:17,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:16:17,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:16:17,688 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:16:17,688 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:16:17,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:16:17,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:16:17,689 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:16:17,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:16:17,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:16:17,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:16:17,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:16:17,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:16:17,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:16:17,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:16:17,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:16:17,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:16:17,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:16:17,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:16:17,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:16:17,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:16:17,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:16:17,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:16:17,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:16:17,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:16:17,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:16:17,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:16:17,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:16:17,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:16:17,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:16:17,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:16:17,696 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_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 [2021-11-21 01:16:17,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:16:18,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:16:18,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:16:18,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:16:18,029 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:16:18,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2n_update_all.i [2021-11-21 01:16:18,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/data/fac1152d6/7623ec263b604f8d935163972ea88851/FLAGc9f30a5d7 [2021-11-21 01:16:18,740 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:16:18,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/sv-benchmarks/c/list-simple/dll2n_update_all.i [2021-11-21 01:16:18,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/data/fac1152d6/7623ec263b604f8d935163972ea88851/FLAGc9f30a5d7 [2021-11-21 01:16:19,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/data/fac1152d6/7623ec263b604f8d935163972ea88851 [2021-11-21 01:16:19,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:16:19,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:16:19,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:16:19,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:16:19,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:16:19,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1084e7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19, skipping insertion in model container [2021-11-21 01:16:19,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:16:19,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:16:19,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2021-11-21 01:16:19,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:16:19,457 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:16:19,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2021-11-21 01:16:19,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:16:19,570 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:16:19,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19 WrapperNode [2021-11-21 01:16:19,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:16:19,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:16:19,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:16:19,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:16:19,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,649 INFO L137 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 111 [2021-11-21 01:16:19,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:16:19,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:16:19,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:16:19,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:16:19,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:16:19,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:16:19,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:16:19,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:16:19,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (1/1) ... [2021-11-21 01:16:19,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:16:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:19,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:16:19,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:16:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-21 01:16:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-21 01:16:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:16:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:16:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:16:19,938 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:16:19,940 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:16:19,977 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-21 01:16:20,143 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:16:20,206 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:16:20,206 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 01:16:20,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:16:20 BoogieIcfgContainer [2021-11-21 01:16:20,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:16:20,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:16:20,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:16:20,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:16:20,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:16:19" (1/3) ... [2021-11-21 01:16:20,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a7ca24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:16:20, skipping insertion in model container [2021-11-21 01:16:20,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:16:19" (2/3) ... [2021-11-21 01:16:20,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a7ca24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:16:20, skipping insertion in model container [2021-11-21 01:16:20,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:16:20" (3/3) ... [2021-11-21 01:16:20,217 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2021-11-21 01:16:20,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:16:20,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:16:20,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:16:20,300 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:16:20,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:16:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:16:20,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:20,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:20,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1570243634, now seen corresponding path program 1 times [2021-11-21 01:16:20,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:20,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229886689] [2021-11-21 01:16:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:20,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:20,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:20,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229886689] [2021-11-21 01:16:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229886689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:20,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:20,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:16:20,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651574893] [2021-11-21 01:16:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:20,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:16:20,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:16:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:16:20,605 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:20,679 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-11-21 01:16:20,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:16:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:16:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:20,687 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:16:20,687 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:16:20,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:16:20,697 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:20,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:16:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:16:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2021-11-21 01:16:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-21 01:16:20,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2021-11-21 01:16:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-21 01:16:20,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-21 01:16:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:16:20,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:20,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:20,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:16:20,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash 299858783, now seen corresponding path program 1 times [2021-11-21 01:16:20,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:20,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541397117] [2021-11-21 01:16:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:20,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:20,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541397117] [2021-11-21 01:16:20,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541397117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823333583] [2021-11-21 01:16:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:20,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:20,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:20,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:16:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:16:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:21,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:21,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823333583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500168393] [2021-11-21 01:16:21,132 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:16:21,132 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:16:21,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:16:21,142 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:16:21,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:16:21,374 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 01:16:21,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-21 01:16:21,458 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:16:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 01:16:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 01:16:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:16:21,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:16:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:21,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:16:22,169 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 01:16:22,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 01:16:22,254 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 01:16:22,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 01:16:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,411 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 01:16:23,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 378 [2021-11-21 01:16:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,439 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:16:23,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 377 treesize of output 362 [2021-11-21 01:16:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:23,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 349 [2021-11-21 01:16:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:23,584 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 01:16:23,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 343 treesize of output 346 [2021-11-21 01:16:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 389 treesize of output 380 [2021-11-21 01:16:23,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:23,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:23,717 INFO L354 Elim1Store]: treesize reduction 247, result has 13.9 percent of original size [2021-11-21 01:16:23,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 377 [2021-11-21 01:16:23,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:23,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 32 [2021-11-21 01:16:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 01:16:24,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 32 [2021-11-21 01:16:25,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:25,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:25,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:25,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:25,348 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 01:16:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 55 [2021-11-21 01:16:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:25,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:16:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:16:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:16:26,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,339 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 01:16:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 01:16:26,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,440 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 01:16:26,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 01:16:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 281 [2021-11-21 01:16:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 01:16:26,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:16:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:16:26,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:26,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:27,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:16:27,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 48 [2021-11-21 01:16:27,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:27,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:16:27,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:16:27,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:27,565 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:16:27,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1500168393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:27,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:16:27,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2021-11-21 01:16:27,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253662308] [2021-11-21 01:16:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:27,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:27,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:27,710 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-11-21 01:16:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:27,767 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2021-11-21 01:16:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:16:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:16:27,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:27,770 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:16:27,770 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:16:27,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:16:27,772 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:27,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:16:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:16:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-21 01:16:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-11-21 01:16:27,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2021-11-21 01:16:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-21 01:16:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-11-21 01:16:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-11-21 01:16:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:16:27,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:27,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:27,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:16:27,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:27,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1448453533, now seen corresponding path program 1 times [2021-11-21 01:16:28,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:28,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714230226] [2021-11-21 01:16:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:28,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:16:28,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714230226] [2021-11-21 01:16:28,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714230226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520031928] [2021-11-21 01:16:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:28,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:28,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:28,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:16:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:16:28,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:16:28,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:16:28,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520031928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588712014] [2021-11-21 01:16:28,247 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:16:28,247 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:16:28,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:16:28,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:16:28,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:16:28,394 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 01:16:28,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-21 01:16:28,465 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:16:28,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 01:16:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:16:28,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:16:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 01:16:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:16:29,055 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 01:16:29,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 01:16:29,102 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 01:16:29,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 01:16:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:29,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,181 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-21 01:16:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 400 treesize of output 386 [2021-11-21 01:16:30,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,275 INFO L354 Elim1Store]: treesize reduction 79, result has 8.1 percent of original size [2021-11-21 01:16:30,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 385 treesize of output 370 [2021-11-21 01:16:30,360 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-21 01:16:30,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 366 treesize of output 357 [2021-11-21 01:16:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,521 INFO L354 Elim1Store]: treesize reduction 353, result has 11.5 percent of original size [2021-11-21 01:16:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 351 treesize of output 356 [2021-11-21 01:16:30,575 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-21 01:16:30,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 443 treesize of output 434 [2021-11-21 01:16:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,672 INFO L354 Elim1Store]: treesize reduction 569, result has 10.1 percent of original size [2021-11-21 01:16:30,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 428 treesize of output 439 [2021-11-21 01:16:30,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:30,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 248 [2021-11-21 01:16:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 53 [2021-11-21 01:16:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:31,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2021-11-21 01:16:32,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:32,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:32,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:32,024 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 01:16:32,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 79 [2021-11-21 01:16:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:32,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:16:32,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 41 [2021-11-21 01:16:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:16:32,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:32,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,046 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-21 01:16:33,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 229 [2021-11-21 01:16:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,132 INFO L354 Elim1Store]: treesize reduction 128, result has 19.0 percent of original size [2021-11-21 01:16:33,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 264 [2021-11-21 01:16:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 281 [2021-11-21 01:16:33,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 01:16:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:16:33,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:16:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 44 [2021-11-21 01:16:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:33,725 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:16:33,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 44 [2021-11-21 01:16:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:33,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:16:34,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:16:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:34,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:34,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:16:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:34,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:34,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:34,877 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-21 01:16:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-21 01:16:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:35,267 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-21 01:16:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-21 01:16:35,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:35,764 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:16:36,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1588712014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:36,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:16:36,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2021-11-21 01:16:36,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406037102] [2021-11-21 01:16:36,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:36,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:16:36,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:16:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:16:36,640 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-11-21 01:16:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:36,766 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-21 01:16:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:16:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 01:16:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:36,768 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:16:36,768 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:16:36,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:16:36,773 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:36,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:16:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:16:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-21 01:16:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-21 01:16:36,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2021-11-21 01:16:36,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:36,787 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-21 01:16:36,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-11-21 01:16:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-21 01:16:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:16:36,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:36,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:36,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:16:37,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:37,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash 474531345, now seen corresponding path program 1 times [2021-11-21 01:16:37,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:37,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005818139] [2021-11-21 01:16:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:37,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:16:37,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:37,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005818139] [2021-11-21 01:16:37,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005818139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:37,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054401087] [2021-11-21 01:16:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:37,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:37,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:37,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:16:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:16:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:16:37,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:16:37,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054401087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:37,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [826031807] [2021-11-21 01:16:37,204 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:16:37,204 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:16:37,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:16:37,204 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:16:37,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:16:37,298 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-21 01:16:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-21 01:16:37,369 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:16:37,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 01:16:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:16:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-21 01:16:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-21 01:16:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 01:16:37,756 INFO L354 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2021-11-21 01:16:37,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 226 treesize of output 249 [2021-11-21 01:16:37,804 INFO L354 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2021-11-21 01:16:37,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 251 [2021-11-21 01:16:38,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,900 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-21 01:16:38,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 378 [2021-11-21 01:16:38,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,932 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:16:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 377 treesize of output 362 [2021-11-21 01:16:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:38,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 349 [2021-11-21 01:16:38,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:38,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 334 [2021-11-21 01:16:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:39,086 INFO L354 Elim1Store]: treesize reduction 187, result has 17.6 percent of original size [2021-11-21 01:16:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 328 treesize of output 331 [2021-11-21 01:16:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:39,174 INFO L354 Elim1Store]: treesize reduction 301, result has 16.2 percent of original size [2021-11-21 01:16:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 449 [2021-11-21 01:16:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 218 [2021-11-21 01:16:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:39,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 47 [2021-11-21 01:16:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:40,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 29 [2021-11-21 01:16:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:40,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:40,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:40,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:40,780 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 01:16:40,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 29 [2021-11-21 01:16:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 65 [2021-11-21 01:16:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:16:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:41,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,832 INFO L354 Elim1Store]: treesize reduction 92, result has 24.6 percent of original size [2021-11-21 01:16:41,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 233 [2021-11-21 01:16:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,902 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 01:16:41,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 264 [2021-11-21 01:16:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 291 [2021-11-21 01:16:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 275 [2021-11-21 01:16:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 11 [2021-11-21 01:16:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:16:42,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 01:16:42,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:16:42,464 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:16:42,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 44 [2021-11-21 01:16:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:16:42,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 44 [2021-11-21 01:16:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:16:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-11-21 01:16:43,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:16:43,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:16:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:43,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:16:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:44,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:16:44,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:45,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 01:16:45,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:16:46,106 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:16:46,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:16:46,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:16:46,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-21 01:16:46,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938383640] [2021-11-21 01:16:46,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:16:46,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:16:46,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:16:46,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:16:46,871 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:46,939 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2021-11-21 01:16:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:16:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:16:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:46,940 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:16:46,940 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:16:46,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:16:46,942 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:46,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:16:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:16:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:16:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-21 01:16:46,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 13 [2021-11-21 01:16:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:46,947 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-21 01:16:46,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-21 01:16:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:16:46,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:46,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:46,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:16:47,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:47,149 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1856804994, now seen corresponding path program 2 times [2021-11-21 01:16:47,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:47,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551214994] [2021-11-21 01:16:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:47,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:16:47,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:47,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551214994] [2021-11-21 01:16:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551214994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:47,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:47,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:16:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325553511] [2021-11-21 01:16:47,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:47,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:16:47,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:16:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:16:47,244 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:47,307 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-11-21 01:16:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:16:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:16:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:47,308 INFO L225 Difference]: With dead ends: 32 [2021-11-21 01:16:47,308 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:16:47,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:16:47,309 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:47,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:16:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:16:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-11-21 01:16:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-21 01:16:47,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 16 [2021-11-21 01:16:47,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:47,316 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-21 01:16:47,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-21 01:16:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:16:47,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:47,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:47,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:16:47,317 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1814988096, now seen corresponding path program 3 times [2021-11-21 01:16:47,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:47,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758191462] [2021-11-21 01:16:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:47,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:47,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758191462] [2021-11-21 01:16:47,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758191462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:16:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592608061] [2021-11-21 01:16:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:16:47,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:47,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:47,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41155c0a-500d-48c9-8f4c-b891ef6b848a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:16:47,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:16:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:16:47,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-21 01:16:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:47,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:16:47,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:16:47,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 01:16:48,100 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-21 01:16:48,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 143 treesize of output 137 [2021-11-21 01:16:48,125 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-21 01:16:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 160 [2021-11-21 01:16:48,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2021-11-21 01:16:48,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 14 [2021-11-21 01:16:48,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2021-11-21 01:16:48,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30