./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd3.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_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/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_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/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_d0ba5424-0904-4406-bef2-d10621d5d618/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 afae6e1207f0c06d84ec8e2e2acf76c1c8773d377a1c0ea49ca1b653981c2bfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:05:15,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:05:15,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:05:15,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:05:15,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:05:15,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:05:15,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:05:15,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:05:15,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:05:15,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:05:15,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:05:15,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:05:15,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:05:15,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:05:15,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:05:15,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:05:15,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:05:15,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:05:15,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:05:15,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:05:15,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:05:15,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:05:15,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:05:15,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:05:15,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:05:15,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:05:15,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:05:15,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:05:15,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:05:15,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:05:15,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:05:15,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:05:15,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:05:15,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:05:15,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:05:15,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:05:15,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:05:15,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:05:15,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:05:15,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:05:15,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:05:15,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:05:15,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:05:15,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:05:15,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:05:15,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:05:15,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:05:15,849 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:05:15,849 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:05:15,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:05:15,850 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:05:15,850 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:05:15,850 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:05:15,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:05:15,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:05:15,852 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:05:15,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:05:15,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:05:15,853 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:05:15,853 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:05:15,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:05:15,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:05:15,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:05:15,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:05:15,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:05:15,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:05:15,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:05:15,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:05:15,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:05:15,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:05:15,863 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:05:15,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:05:15,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:05:15,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:05:15,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:05:15,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:05:15,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:05:15,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:05:15,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:05:15,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:05:15,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:05:15,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:05:15,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:05:15,869 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_d0ba5424-0904-4406-bef2-d10621d5d618/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afae6e1207f0c06d84ec8e2e2acf76c1c8773d377a1c0ea49ca1b653981c2bfd [2021-11-21 01:05:16,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:05:16,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:05:16,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:05:16,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:05:16,199 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:05:16,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-crafted/bAnd3.i [2021-11-21 01:05:16,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/data/09f1cb5ac/b7e42871b20142b2b8a45c4651eade82/FLAGe6db2a9ed [2021-11-21 01:05:16,684 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:05:16,684 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/sv-benchmarks/c/array-crafted/bAnd3.i [2021-11-21 01:05:16,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/data/09f1cb5ac/b7e42871b20142b2b8a45c4651eade82/FLAGe6db2a9ed [2021-11-21 01:05:17,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/data/09f1cb5ac/b7e42871b20142b2b8a45c4651eade82 [2021-11-21 01:05:17,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:05:17,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:05:17,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:05:17,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:05:17,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:05:17,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c074759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17, skipping insertion in model container [2021-11-21 01:05:17,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:05:17,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:05:17,348 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_d0ba5424-0904-4406-bef2-d10621d5d618/sv-benchmarks/c/array-crafted/bAnd3.i[1302,1315] [2021-11-21 01:05:17,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:05:17,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:05:17,406 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_d0ba5424-0904-4406-bef2-d10621d5d618/sv-benchmarks/c/array-crafted/bAnd3.i[1302,1315] [2021-11-21 01:05:17,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:05:17,426 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:05:17,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17 WrapperNode [2021-11-21 01:05:17,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:05:17,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:05:17,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:05:17,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:05:17,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,477 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-11-21 01:05:17,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:05:17,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:05:17,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:05:17,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:05:17,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:05:17,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:05:17,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:05:17,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:05:17,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (1/1) ... [2021-11-21 01:05:17,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:05:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:17,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:05:17,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:05:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:05:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:05:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:05:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:05:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2021-11-21 01:05:17,605 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2021-11-21 01:05:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:05:17,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:05:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:05:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:05:17,705 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:05:17,706 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:05:17,829 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:05:17,855 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:05:17,855 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:05:17,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:17 BoogieIcfgContainer [2021-11-21 01:05:17,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:05:17,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:05:17,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:05:17,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:05:17,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:05:17" (1/3) ... [2021-11-21 01:05:17,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e66827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:05:17, skipping insertion in model container [2021-11-21 01:05:17,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:17" (2/3) ... [2021-11-21 01:05:17,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e66827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:05:17, skipping insertion in model container [2021-11-21 01:05:17,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:17" (3/3) ... [2021-11-21 01:05:17,866 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd3.i [2021-11-21 01:05:17,871 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:05:17,872 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:05:17,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:05:17,925 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 01:05:17,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:05:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:05:17,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:17,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:17,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2038165787, now seen corresponding path program 1 times [2021-11-21 01:05:17,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:17,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783099012] [2021-11-21 01:05:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:17,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:05:18,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783099012] [2021-11-21 01:05:18,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783099012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:18,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:18,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:05:18,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199740270] [2021-11-21 01:05:18,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:18,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:05:18,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:05:18,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:05:18,181 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:05:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:18,241 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-21 01:05:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:05:18,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-21 01:05:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:18,249 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:05:18,250 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:05:18,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:05:18,258 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:18,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:18,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:05:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-21 01:05:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-21 01:05:18,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-21 01:05:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:18,327 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-21 01:05:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:05:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-21 01:05:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:05:18,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:18,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:18,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:05:18,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:18,330 INFO L85 PathProgramCache]: Analyzing trace with hash -524670362, now seen corresponding path program 1 times [2021-11-21 01:05:18,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:18,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836922280] [2021-11-21 01:05:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:18,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:05:18,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836922280] [2021-11-21 01:05:18,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836922280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028204166] [2021-11-21 01:05:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:18,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:18,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:18,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:05:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:05:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:05:18,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:05:18,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028204166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:18,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:05:18,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:05:18,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906352556] [2021-11-21 01:05:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:18,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:05:18,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:05:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:18,669 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:05:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:18,704 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-21 01:05:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:05:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-21 01:05:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:18,706 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:05:18,706 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:05:18,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:18,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:18,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:05:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:05:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-21 01:05:18,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-21 01:05:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:18,715 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-21 01:05:18,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:05:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-21 01:05:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:05:18,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:18,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:18,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:18,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:18,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -664333790, now seen corresponding path program 1 times [2021-11-21 01:05:18,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:18,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339209594] [2021-11-21 01:05:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:18,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:05:18,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:18,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339209594] [2021-11-21 01:05:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339209594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733563148] [2021-11-21 01:05:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:18,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:18,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:18,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:05:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:19,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:05:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:05:19,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:05:19,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733563148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:19,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:05:19,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:05:19,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331707699] [2021-11-21 01:05:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:19,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:05:19,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:05:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:19,110 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:05:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:19,142 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-21 01:05:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:05:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-21 01:05:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:19,145 INFO L225 Difference]: With dead ends: 27 [2021-11-21 01:05:19,145 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 01:05:19,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:19,148 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:19,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 01:05:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 01:05:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 01:05:19,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-21 01:05:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:19,165 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 01:05:19,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:05:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 01:05:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:05:19,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:19,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:19,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:05:19,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:19,380 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1922418725, now seen corresponding path program 1 times [2021-11-21 01:05:19,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:19,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292324341] [2021-11-21 01:05:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:19,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:05:19,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292324341] [2021-11-21 01:05:19,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292324341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:19,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140053197] [2021-11-21 01:05:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:19,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:19,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:19,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:05:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:05:19,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:05:19,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:05:19,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140053197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940444377] [2021-11-21 01:05:19,718 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:19,718 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:19,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:19,733 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:19,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:19,834 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:05:19,835 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 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 01:05:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:19,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:19,879 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:20,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:05:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:20,220 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:05:20,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2021-11-21 01:05:20,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:20,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:21,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-21 01:05:21,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:21,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:21,441 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-21 01:05:21,447 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 3 case distinctions, treesize of input 54 treesize of output 62 [2021-11-21 01:05:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:21,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:22,059 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:22,238 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:22,796 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:22,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:22,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2021-11-21 01:05:22,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547928230] [2021-11-21 01:05:22,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:22,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:05:22,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:05:22,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:05:22,799 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:22,830 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-21 01:05:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:05:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-21 01:05:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:22,831 INFO L225 Difference]: With dead ends: 36 [2021-11-21 01:05:22,831 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 01:05:22,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:05:22,833 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:22,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 01:05:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-21 01:05:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-21 01:05:22,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-21 01:05:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:22,839 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-21 01:05:22,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-21 01:05:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:05:22,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:22,840 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:22,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:23,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:23,055 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash 763213520, now seen corresponding path program 2 times [2021-11-21 01:05:23,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:23,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556259986] [2021-11-21 01:05:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:23,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:05:23,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556259986] [2021-11-21 01:05:23,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556259986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588981173] [2021-11-21 01:05:23,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:05:23,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:23,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:23,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:23,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:05:23,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:05:23,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:05:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:05:23,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:05:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588981173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:23,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954551664] [2021-11-21 01:05:23,314 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:23,314 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:23,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:23,315 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:23,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,355 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:05:23,355 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 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 01:05:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,389 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:23,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:23,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:05:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,522 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:05:23,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2021-11-21 01:05:23,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:23,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:24,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:05:24,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,294 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:05:24,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:05:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:24,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:24,871 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:25,079 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:25,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:25,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:25,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-21 01:05:25,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928961092] [2021-11-21 01:05:25,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:25,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:05:25,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:05:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:05:25,551 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:25,575 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-21 01:05:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:05:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-11-21 01:05:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:25,576 INFO L225 Difference]: With dead ends: 38 [2021-11-21 01:05:25,576 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 01:05:25,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:05:25,578 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:25,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 01:05:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-21 01:05:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-21 01:05:25,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-21 01:05:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:25,594 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-21 01:05:25,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-21 01:05:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:05:25,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:25,597 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:25,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:05:25,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:25,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash 843318224, now seen corresponding path program 3 times [2021-11-21 01:05:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947890949] [2021-11-21 01:05:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:25,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-21 01:05:25,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947890949] [2021-11-21 01:05:25,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947890949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313552117] [2021-11-21 01:05:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:05:25,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:25,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:25,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:05:25,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:05:25,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:05:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-21 01:05:26,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-21 01:05:26,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313552117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844840309] [2021-11-21 01:05:26,168 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:26,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:26,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:26,169 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:26,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,199 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:05:26,199 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 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 01:05:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,240 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:26,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:26,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:05:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:26,379 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:05:26,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2021-11-21 01:05:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:26,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:05:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,280 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:05:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:05:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:27,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:27,828 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:28,006 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:28,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:28,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:28,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2021-11-21 01:05:28,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061811829] [2021-11-21 01:05:28,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:28,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:05:28,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:05:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:05:28,568 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 01:05:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:28,621 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-21 01:05:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:05:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2021-11-21 01:05:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:28,622 INFO L225 Difference]: With dead ends: 49 [2021-11-21 01:05:28,622 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 01:05:28,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:05:28,625 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:28,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 01:05:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 01:05:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-21 01:05:28,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2021-11-21 01:05:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:28,637 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-21 01:05:28,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 01:05:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-21 01:05:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:05:28,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:28,641 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:28,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:05:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:28,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash 834270235, now seen corresponding path program 4 times [2021-11-21 01:05:28,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442980986] [2021-11-21 01:05:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:28,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-21 01:05:29,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:29,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442980986] [2021-11-21 01:05:29,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442980986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:29,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753247236] [2021-11-21 01:05:29,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:05:29,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:29,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:29,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:05:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:29,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-21 01:05:29,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-21 01:05:29,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753247236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:29,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1661160723] [2021-11-21 01:05:29,427 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:29,427 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:29,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:29,428 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:29,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,469 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:29,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:29,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:05:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:05:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,621 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:05:29,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2021-11-21 01:05:29,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:29,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:05:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,327 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:05:30,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:05:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:30,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:30,832 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:30,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:31,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:31,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:31,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2021-11-21 01:05:31,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497941102] [2021-11-21 01:05:31,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:31,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:05:31,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:31,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:05:31,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:05:31,479 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:31,530 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-11-21 01:05:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:05:31,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2021-11-21 01:05:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:31,538 INFO L225 Difference]: With dead ends: 62 [2021-11-21 01:05:31,538 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:05:31,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:05:31,540 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:31,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:05:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-21 01:05:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-21 01:05:31,546 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2021-11-21 01:05:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:31,547 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-21 01:05:31,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:31,547 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-21 01:05:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:05:31,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:31,549 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:31,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:31,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:31,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -208173989, now seen corresponding path program 5 times [2021-11-21 01:05:31,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:31,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426896048] [2021-11-21 01:05:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:31,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-21 01:05:32,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426896048] [2021-11-21 01:05:32,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426896048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098703973] [2021-11-21 01:05:32,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:05:32,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:32,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:32,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:32,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:05:32,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:05:32,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:05:32,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-21 01:05:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-21 01:05:32,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098703973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53169396] [2021-11-21 01:05:32,537 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:32,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:32,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:32,538 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:32,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,574 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 01:05:32,574 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 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 01:05:32,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,602 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:05:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,721 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:05:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2021-11-21 01:05:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-21 01:05:33,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,426 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-21 01:05:33,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 62 [2021-11-21 01:05:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:34,025 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:34,218 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:35,157 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:35,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:35,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2021-11-21 01:05:35,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44212574] [2021-11-21 01:05:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:35,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-21 01:05:35,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-21 01:05:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:05:35,161 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:35,250 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-11-21 01:05:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 01:05:35,252 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2021-11-21 01:05:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:35,253 INFO L225 Difference]: With dead ends: 69 [2021-11-21 01:05:35,253 INFO L226 Difference]: Without dead ends: 50 [2021-11-21 01:05:35,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:05:35,255 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:35,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-21 01:05:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-21 01:05:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-21 01:05:35,262 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2021-11-21 01:05:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:35,263 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-21 01:05:35,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-21 01:05:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:05:35,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:35,265 INFO L514 BasicCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:35,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:35,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:35,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:35,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1077789606, now seen corresponding path program 6 times [2021-11-21 01:05:35,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:35,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757531881] [2021-11-21 01:05:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:35,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:35,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757531881] [2021-11-21 01:05:35,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757531881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221281744] [2021-11-21 01:05:35,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:05:35,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:35,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:35,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:35,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:05:35,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:05:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:05:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:36,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221281744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22558743] [2021-11-21 01:05:36,791 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:36,791 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:36,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:36,792 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:36,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,823 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:36,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:05:36,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:05:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:36,963 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:05:36,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2021-11-21 01:05:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:37,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-21 01:05:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:37,659 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-21 01:05:37,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 67 [2021-11-21 01:05:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:37,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:37,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:38,179 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:38,360 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:39,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:39,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:39,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2021-11-21 01:05:39,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539220450] [2021-11-21 01:05:39,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:39,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-21 01:05:39,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-21 01:05:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=2702, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:05:39,214 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:39,318 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2021-11-21 01:05:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-21 01:05:39,319 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2021-11-21 01:05:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:39,322 INFO L225 Difference]: With dead ends: 100 [2021-11-21 01:05:39,322 INFO L226 Difference]: Without dead ends: 75 [2021-11-21 01:05:39,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1330, Invalid=2702, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:05:39,327 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:39,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-21 01:05:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-21 01:05:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-21 01:05:39,348 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2021-11-21 01:05:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:39,348 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-21 01:05:39,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-21 01:05:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 01:05:39,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:39,358 INFO L514 BasicCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:39,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:39,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:39,571 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1675595141, now seen corresponding path program 7 times [2021-11-21 01:05:39,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:39,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120989788] [2021-11-21 01:05:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:39,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:40,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120989788] [2021-11-21 01:05:40,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120989788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370410590] [2021-11-21 01:05:40,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:05:40,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:40,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:40,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:05:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-21 01:05:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:41,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:43,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370410590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:43,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116412270] [2021-11-21 01:05:43,773 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:43,773 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:43,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:43,773 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:43,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:43,801 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:05:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:43,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:05:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:43,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:43,937 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:05:43,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2021-11-21 01:05:44,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:44,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:44,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:05:44,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,673 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:05:44,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:05:44,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:45,091 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:45,244 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:45,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:45,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:45,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2021-11-21 01:05:45,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535574305] [2021-11-21 01:05:45,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:45,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-21 01:05:45,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-21 01:05:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5101, Invalid=7781, Unknown=0, NotChecked=0, Total=12882 [2021-11-21 01:05:45,924 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:46,102 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2021-11-21 01:05:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-21 01:05:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2021-11-21 01:05:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:46,105 INFO L225 Difference]: With dead ends: 150 [2021-11-21 01:05:46,105 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 01:05:46,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5101, Invalid=7781, Unknown=0, NotChecked=0, Total=12882 [2021-11-21 01:05:46,115 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:46,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 01:05:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-21 01:05:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-11-21 01:05:46,148 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2021-11-21 01:05:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:46,150 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-11-21 01:05:46,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:05:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-11-21 01:05:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 01:05:46,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:46,154 INFO L514 BasicCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:46,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:46,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:05:46,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash -483746597, now seen corresponding path program 8 times [2021-11-21 01:05:46,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:46,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723581445] [2021-11-21 01:05:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:46,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-21 01:05:49,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723581445] [2021-11-21 01:05:49,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723581445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377633052] [2021-11-21 01:05:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:05:49,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:49,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:49,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:05:49,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:05:49,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:05:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2021-11-21 01:05:50,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2021-11-21 01:05:50,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377633052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:50,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299812589] [2021-11-21 01:05:50,419 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:50,419 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:50,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:50,420 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:50,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,465 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:05:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:05:50,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:05:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:05:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,603 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:05:50,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2021-11-21 01:05:50,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:05:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:50,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:05:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:51,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:05:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,249 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:05:51,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:05:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:51,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:05:51,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:05:51,665 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:05:51,808 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:52,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:52,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:05:52,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2021-11-21 01:05:52,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19658480] [2021-11-21 01:05:52,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-21 01:05:52,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-21 01:05:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=9152, Unknown=0, NotChecked=0, Total=14280 [2021-11-21 01:05:52,803 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:52,947 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-11-21 01:05:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-21 01:05:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2021-11-21 01:05:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:52,951 INFO L225 Difference]: With dead ends: 155 [2021-11-21 01:05:52,951 INFO L226 Difference]: Without dead ends: 130 [2021-11-21 01:05:52,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5128, Invalid=9152, Unknown=0, NotChecked=0, Total=14280 [2021-11-21 01:05:52,956 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:52,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-21 01:05:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-21 01:05:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-11-21 01:05:52,976 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2021-11-21 01:05:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:52,976 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-11-21 01:05:52,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-11-21 01:05:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-21 01:05:52,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:52,980 INFO L514 BasicCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:53,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:53,183 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -531749082, now seen corresponding path program 9 times [2021-11-21 01:05:53,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:53,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146108322] [2021-11-21 01:05:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:53,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:05:56,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:56,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146108322] [2021-11-21 01:05:56,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146108322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374798819] [2021-11-21 01:05:56,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:05:56,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:56,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:56,643 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:56,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:05:56,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:05:56,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-21 01:05:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:05:57,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:06:06,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374798819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:06,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537721613] [2021-11-21 01:06:06,750 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:06:06,750 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:06:06,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:06:06,751 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:06:06,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:06:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,779 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:06:06,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:06:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:06:06,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:06:06,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:06,914 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:06:06,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2021-11-21 01:06:07,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:06:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:06:07,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:07,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:06:07,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,611 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:06:07,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:06:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:06:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:06:08,023 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:06:08,168 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:06:09,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:06:09,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:06:09,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2021-11-21 01:06:09,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155306039] [2021-11-21 01:06:09,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:09,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-21 01:06:09,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-21 01:06:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20555, Invalid=25885, Unknown=0, NotChecked=0, Total=46440 [2021-11-21 01:06:09,288 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:06:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:09,726 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2021-11-21 01:06:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-21 01:06:09,727 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2021-11-21 01:06:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:09,729 INFO L225 Difference]: With dead ends: 260 [2021-11-21 01:06:09,729 INFO L226 Difference]: Without dead ends: 231 [2021-11-21 01:06:09,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4335 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=20555, Invalid=25885, Unknown=0, NotChecked=0, Total=46440 [2021-11-21 01:06:09,734 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:09,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:06:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-21 01:06:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-21 01:06:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:06:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2021-11-21 01:06:09,747 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2021-11-21 01:06:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:09,747 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2021-11-21 01:06:09,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:06:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2021-11-21 01:06:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-21 01:06:09,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:09,752 INFO L514 BasicCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:09,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:09,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:09,970 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 91185211, now seen corresponding path program 10 times [2021-11-21 01:06:09,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:09,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195086463] [2021-11-21 01:06:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:09,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:06:23,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:23,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195086463] [2021-11-21 01:06:23,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195086463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:23,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999556721] [2021-11-21 01:06:23,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:06:23,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:23,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:06:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:23,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-21 01:06:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:06:23,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:07:02,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999556721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:02,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647199708] [2021-11-21 01:07:02,218 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:07:02,218 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:07:02,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:07:02,219 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:07:02,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:07:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:02,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:02,248 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:07:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:07:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:02,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:07:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:02,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:07:02,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:02,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:07:02,432 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:07:02,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2021-11-21 01:07:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:07:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:02,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:07:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:07:03,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:07:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,057 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:07:03,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:07:03,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:07:03,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:07:03,498 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:07:03,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:07:05,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:07:05,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:07:05,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2021-11-21 01:07:05,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760185167] [2021-11-21 01:07:05,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:07:05,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-21 01:07:05,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:05,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-21 01:07:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81861, Invalid=92445, Unknown=0, NotChecked=0, Total=174306 [2021-11-21 01:07:05,378 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:07:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:07,200 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2021-11-21 01:07:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-21 01:07:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2021-11-21 01:07:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:07,204 INFO L225 Difference]: With dead ends: 462 [2021-11-21 01:07:07,204 INFO L226 Difference]: Without dead ends: 433 [2021-11-21 01:07:07,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=81861, Invalid=92445, Unknown=0, NotChecked=0, Total=174306 [2021-11-21 01:07:07,213 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:07,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-21 01:07:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2021-11-21 01:07:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:07:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2021-11-21 01:07:07,233 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2021-11-21 01:07:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:07,233 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2021-11-21 01:07:07,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:07:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2021-11-21 01:07:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-11-21 01:07:07,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:07,244 INFO L514 BasicCegarLoop]: trace histogram [402, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:07,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:07,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:07:07,462 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash 398193435, now seen corresponding path program 11 times [2021-11-21 01:07:07,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:07,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910060659] [2021-11-21 01:07:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:07,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-21 01:08:00,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910060659] [2021-11-21 01:08:00,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910060659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:08:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758582389] [2021-11-21 01:08:00,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:08:00,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:00,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:08:00,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:08:00,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:08:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:08:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:08:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 81291 trivial. 0 not checked. [2021-11-21 01:08:01,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 81537 trivial. 0 not checked. [2021-11-21 01:08:03,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758582389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246618095] [2021-11-21 01:08:03,465 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:08:03,465 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:08:03,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:08:03,466 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:08:03,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:08:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:03,504 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:08:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:08:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:03,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:08:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:03,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:08:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:03,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:03,639 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:08:03,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2021-11-21 01:08:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:08:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:08:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:04,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-21 01:08:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,314 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-21 01:08:04,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 62 treesize of output 54 [2021-11-21 01:08:04,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:08:04,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:08:04,781 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:08:04,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:08:08,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:08:08,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:08:08,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2021-11-21 01:08:08,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285797281] [2021-11-21 01:08:08,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:08:08,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2021-11-21 01:08:08,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2021-11-21 01:08:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81981, Invalid=104211, Unknown=0, NotChecked=0, Total=186192 [2021-11-21 01:08:08,346 INFO L87 Difference]: Start difference. First operand 433 states and 437 transitions. Second operand has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:08:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:10,293 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2021-11-21 01:08:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2021-11-21 01:08:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 458 [2021-11-21 01:08:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:10,298 INFO L225 Difference]: With dead ends: 471 [2021-11-21 01:08:10,298 INFO L226 Difference]: Without dead ends: 442 [2021-11-21 01:08:10,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11140 ImplicationChecksByTransitivity, 56.1s TimeCoverageRelationStatistics Valid=81981, Invalid=104211, Unknown=0, NotChecked=0, Total=186192 [2021-11-21 01:08:10,311 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:10,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:08:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-21 01:08:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-11-21 01:08:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:08:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2021-11-21 01:08:10,333 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2021-11-21 01:08:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:10,334 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2021-11-21 01:08:10,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:08:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2021-11-21 01:08:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-21 01:08:10,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:10,346 INFO L514 BasicCegarLoop]: trace histogram [403, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:10,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:10,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:08:10,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1476330918, now seen corresponding path program 12 times [2021-11-21 01:08:10,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073441657] [2021-11-21 01:08:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:10,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-21 01:09:02,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:02,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073441657] [2021-11-21 01:09:02,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073441657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:09:02,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521119080] [2021-11-21 01:09:02,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:09:02,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:02,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:02,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:09:02,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:09:03,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:09:03,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:09:03,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 405 conjunts are in the unsatisfiable core [2021-11-21 01:09:03,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:09:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-21 01:09:04,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:11:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-21 01:11:42,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521119080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:11:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998999617] [2021-11-21 01:11:42,431 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:11:42,431 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:11:42,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:11:42,432 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:11:42,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:11:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:42,470 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:11:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:11:42,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:42,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-11-21 01:11:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:42,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 01:11:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:42,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:11:42,619 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 01:11:42,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2021-11-21 01:11:42,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:11:43,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:43,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-21 01:11:43,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:43,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-21 01:11:43,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:43,351 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-21 01:11:43,351 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 3 case distinctions, treesize of input 54 treesize of output 62 [2021-11-21 01:11:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:11:43,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:11:43,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:11:43,969 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 15 for LOIs [2021-11-21 01:11:44,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:11:47,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:11:47,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:11:47,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2021-11-21 01:11:47,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773521678] [2021-11-21 01:11:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:11:47,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2021-11-21 01:11:47,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2021-11-21 01:11:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328506, Invalid=349646, Unknown=0, NotChecked=0, Total=678152 [2021-11-21 01:11:47,379 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:12:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:02,578 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2021-11-21 01:12:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2021-11-21 01:12:02,579 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 467 [2021-11-21 01:12:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:02,586 INFO L225 Difference]: With dead ends: 884 [2021-11-21 01:12:02,586 INFO L226 Difference]: Without dead ends: 847 [2021-11-21 01:12:02,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 210.7s TimeCoverageRelationStatistics Valid=328506, Invalid=349646, Unknown=0, NotChecked=0, Total=678152 [2021-11-21 01:12:02,641 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:02,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:12:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-21 01:12:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2021-11-21 01:12:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.003562945368171) internal successors, (845), 842 states have internal predecessors, (845), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:12:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2021-11-21 01:12:02,683 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2021-11-21 01:12:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2021-11-21 01:12:02,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:12:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2021-11-21 01:12:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2021-11-21 01:12:02,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:02,695 INFO L514 BasicCegarLoop]: trace histogram [808, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:02,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:12:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:12:02,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:12:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 534940859, now seen corresponding path program 13 times [2021-11-21 01:12:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083907106] [2021-11-21 01:12:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 327475 backedges. 0 proven. 326836 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-21 01:15:40,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083907106] [2021-11-21 01:15:40,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083907106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:15:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774482387] [2021-11-21 01:15:40,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:15:40,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:40,494 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:40,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0ba5424-0904-4406-bef2-d10621d5d618/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:15:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:41,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 5106 conjuncts, 810 conjunts are in the unsatisfiable core [2021-11-21 01:15:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 327475 backedges. 0 proven. 326836 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-21 01:15:43,326 INFO L328 TraceCheckSpWp]: Computing backward predicates...