./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partial_init_ground.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_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/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_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/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_0999deb5-9a8d-417a-a7ca-45c9b6178593/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 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:20:12,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:20:12,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:20:12,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:20:12,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:20:12,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:20:12,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:20:12,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:20:12,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:20:12,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:20:12,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:20:12,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:20:12,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:20:12,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:20:12,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:20:12,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:20:12,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:20:12,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:20:12,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:20:12,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:20:12,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:20:12,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:20:12,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:20:12,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:20:12,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:20:12,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:20:12,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:20:12,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:20:12,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:20:12,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:20:12,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:20:12,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:20:12,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:20:12,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:20:12,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:20:12,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:20:12,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:20:12,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:20:12,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:20:12,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:20:12,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:20:12,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:20:12,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:20:12,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:20:12,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:20:12,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:20:12,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:20:12,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:20:12,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:20:12,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:20:12,271 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:20:12,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:20:12,273 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:20:12,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:20:12,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:20:12,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:20:12,274 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:20:12,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:20:12,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:20:12,274 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:20:12,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:20:12,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:20:12,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:20:12,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:20:12,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:20:12,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:20:12,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:20:12,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:20:12,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:20:12,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:20:12,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:20:12,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:20:12,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:20:12,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:20:12,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:12,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:20:12,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:20:12,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:20:12,281 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:20:12,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:20:12,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:20:12,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:20:12,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:20:12,282 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_0999deb5-9a8d-417a-a7ca-45c9b6178593/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 [2021-11-21 01:20:12,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:20:12,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:20:12,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:20:12,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:20:12,565 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:20:12,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2021-11-21 01:20:12,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/data/dade6d60d/313b7d6e82d7483dbdbe65caca5f5a51/FLAG084a00fb7 [2021-11-21 01:20:13,253 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:20:13,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2021-11-21 01:20:13,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/data/dade6d60d/313b7d6e82d7483dbdbe65caca5f5a51/FLAG084a00fb7 [2021-11-21 01:20:13,574 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/data/dade6d60d/313b7d6e82d7483dbdbe65caca5f5a51 [2021-11-21 01:20:13,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:20:13,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:20:13,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:13,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:20:13,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:20:13,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:13,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b92a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13, skipping insertion in model container [2021-11-21 01:20:13,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:13,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:20:13,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:20:13,835 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_0999deb5-9a8d-417a-a7ca-45c9b6178593/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2021-11-21 01:20:13,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:13,879 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:20:13,901 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_0999deb5-9a8d-417a-a7ca-45c9b6178593/sv-benchmarks/c/array-examples/standard_partial_init_ground.i[821,834] [2021-11-21 01:20:13,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:13,950 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:20:13,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13 WrapperNode [2021-11-21 01:20:13,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:13,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:13,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:20:13,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:20:13,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:13,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,020 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2021-11-21 01:20:14,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:14,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:20:14,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:20:14,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:20:14,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:20:14,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:20:14,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:20:14,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:20:14,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (1/1) ... [2021-11-21 01:20:14,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:14,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:14,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:20:14,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:20:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:20:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:20:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:20:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:20:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:20:14,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:20:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:20:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:20:14,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:20:14,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:20:14,301 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:20:14,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:20:14,535 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:20:14,642 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:20:14,642 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:20:14,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:14 BoogieIcfgContainer [2021-11-21 01:20:14,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:20:14,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:20:14,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:20:14,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:20:14,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:20:13" (1/3) ... [2021-11-21 01:20:14,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aa5589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:14, skipping insertion in model container [2021-11-21 01:20:14,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:13" (2/3) ... [2021-11-21 01:20:14,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aa5589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:14, skipping insertion in model container [2021-11-21 01:20:14,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:14" (3/3) ... [2021-11-21 01:20:14,671 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2021-11-21 01:20:14,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:20:14,678 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:20:14,799 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:20:14,808 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 01:20:14,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:20:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:20:14,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:14,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:14,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1629969816, now seen corresponding path program 1 times [2021-11-21 01:20:14,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402042487] [2021-11-21 01:20:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:14,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:20:15,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402042487] [2021-11-21 01:20:15,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402042487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:15,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:15,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:20:15,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135523347] [2021-11-21 01:20:15,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:15,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:20:15,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:20:15,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:15,127 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:15,186 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2021-11-21 01:20:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:20:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:20:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:15,206 INFO L225 Difference]: With dead ends: 32 [2021-11-21 01:20:15,206 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:20:15,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:20:15,222 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:15,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:20:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:20:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:20:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-21 01:20:15,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2021-11-21 01:20:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:15,310 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-21 01:20:15,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-21 01:20:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:20:15,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:15,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:15,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:20:15,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 761335963, now seen corresponding path program 1 times [2021-11-21 01:20:15,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419309408] [2021-11-21 01:20:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:20:15,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:15,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419309408] [2021-11-21 01:20:15,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419309408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:15,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421922340] [2021-11-21 01:20:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:15,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:15,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:15,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:20:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:15,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:20:15,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:20:15,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:20:15,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421922340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213689250] [2021-11-21 01:20:15,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:20:15,645 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:15,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:15,659 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:15,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,892 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-21 01:20:15,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2021-11-21 01:20:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,061 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-21 01:20:16,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-21 01:20:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-21 01:20:16,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:16,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:16,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:16,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:16,937 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:20:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 338 treesize of output 328 [2021-11-21 01:20:18,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:18,702 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:20:18,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-21 01:20:18,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:18,913 INFO L354 Elim1Store]: treesize reduction 46, result has 41.8 percent of original size [2021-11-21 01:20:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-11-21 01:20:19,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:19,138 INFO L354 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2021-11-21 01:20:19,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2021-11-21 01:20:19,566 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:20:19,628 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:20:19,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:20:19,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:20:19,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-21 01:20:19,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339347598] [2021-11-21 01:20:19,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:20:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:20:19,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:20:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:20:19,908 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:19,955 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-11-21 01:20:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:20:19,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:20:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:19,957 INFO L225 Difference]: With dead ends: 37 [2021-11-21 01:20:19,957 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:20:19,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:20:19,960 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:19,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:20:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:20:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 01:20:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-21 01:20:19,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2021-11-21 01:20:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:19,968 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-21 01:20:19,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-21 01:20:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:20:19,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:19,970 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:20,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:20,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:20,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1625783208, now seen corresponding path program 2 times [2021-11-21 01:20:20,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210878066] [2021-11-21 01:20:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:20,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:20:20,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210878066] [2021-11-21 01:20:20,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210878066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:20,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120220566] [2021-11-21 01:20:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:20:20,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:20,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:20,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:20:20,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:20:20,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:20:20,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:20:20,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:20:20,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:20:20,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120220566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:20,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632641006] [2021-11-21 01:20:20,512 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:20:20,513 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:20,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:20,513 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:20,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,594 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-21 01:20:20,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2021-11-21 01:20:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,727 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-21 01:20:20,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-21 01:20:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:20,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-21 01:20:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:21,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:21,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:21,191 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:20:21,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 338 treesize of output 328 [2021-11-21 01:20:22,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:22,665 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:20:22,665 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-21 01:20:22,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:22,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:22,896 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-21 01:20:22,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:20:23,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:23,133 INFO L354 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2021-11-21 01:20:23,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2021-11-21 01:20:23,556 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:20:23,618 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:20:23,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:20:23,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:20:23,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-21 01:20:23,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425860639] [2021-11-21 01:20:23,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:20:23,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:20:23,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:20:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:20:23,894 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:23,993 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-11-21 01:20:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:20:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:20:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:23,996 INFO L225 Difference]: With dead ends: 52 [2021-11-21 01:20:23,996 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 01:20:23,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:20:23,998 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:24,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:20:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 01:20:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-21 01:20:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-21 01:20:24,008 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 16 [2021-11-21 01:20:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-21 01:20:24,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-21 01:20:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:20:24,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:24,011 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:24,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:24,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:24,227 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash -487711352, now seen corresponding path program 3 times [2021-11-21 01:20:24,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:24,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134250892] [2021-11-21 01:20:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:24,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-21 01:20:24,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:24,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134250892] [2021-11-21 01:20:24,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134250892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:24,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485545607] [2021-11-21 01:20:24,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:20:24,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:24,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:24,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:24,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:20:24,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:20:24,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:20:24,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:20:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-21 01:20:24,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-21 01:20:24,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485545607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017577857] [2021-11-21 01:20:24,936 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:20:24,936 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:24,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:24,937 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:24,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,086 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-21 01:20:25,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-21 01:20:25,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-21 01:20:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-21 01:20:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:25,573 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:20:25,573 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 7 case distinctions, treesize of input 358 treesize of output 326 [2021-11-21 01:20:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:26,051 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:20:26,055 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-21 01:20:26,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:26,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:26,274 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-21 01:20:26,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:20:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:26,512 INFO L354 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2021-11-21 01:20:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2021-11-21 01:20:26,759 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:20:26,811 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:20:27,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:20:27,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:20:27,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-21 01:20:27,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614135711] [2021-11-21 01:20:27,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:20:27,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:20:27,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:20:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:20:27,020 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:27,182 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2021-11-21 01:20:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:20:27,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 01:20:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:27,191 INFO L225 Difference]: With dead ends: 82 [2021-11-21 01:20:27,191 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:20:27,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:20:27,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:27,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:20:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:20:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-21 01:20:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-21 01:20:27,221 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2021-11-21 01:20:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:27,225 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-21 01:20:27,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-21 01:20:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:20:27,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:27,228 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:27,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:27,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:27,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:27,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1925937480, now seen corresponding path program 4 times [2021-11-21 01:20:27,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:27,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760491232] [2021-11-21 01:20:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:27,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-21 01:20:27,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:27,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760491232] [2021-11-21 01:20:27,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760491232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:27,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005838944] [2021-11-21 01:20:27,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:20:27,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:27,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:27,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:27,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:20:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:28,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:20:28,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-21 01:20:28,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-21 01:20:28,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005838944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:28,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592357291] [2021-11-21 01:20:28,903 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:20:28,903 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:28,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:28,904 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:28,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:28,987 INFO L354 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2021-11-21 01:20:28,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2021-11-21 01:20:29,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-11-21 01:20:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-21 01:20:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:29,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:29,314 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:20:29,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 338 treesize of output 328 [2021-11-21 01:20:30,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:30,547 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 01:20:30,547 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-21 01:20:30,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:30,716 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-21 01:20:30,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:20:30,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:20:30,914 INFO L354 Elim1Store]: treesize reduction 72, result has 45.0 percent of original size [2021-11-21 01:20:30,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 75 [2021-11-21 01:20:31,267 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:20:31,307 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:20:31,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:20:31,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:20:31,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-21 01:20:31,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990706822] [2021-11-21 01:20:31,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:20:31,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-21 01:20:31,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-21 01:20:31,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:20:31,535 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:31,918 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2021-11-21 01:20:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:20:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 01:20:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:31,921 INFO L225 Difference]: With dead ends: 142 [2021-11-21 01:20:31,921 INFO L226 Difference]: Without dead ends: 107 [2021-11-21 01:20:31,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1197, Invalid=1883, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:20:31,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:31,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:20:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-21 01:20:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-21 01:20:31,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:20:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-11-21 01:20:31,936 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 52 [2021-11-21 01:20:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-11-21 01:20:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-11-21 01:20:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 01:20:31,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:31,940 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:31,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:32,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:32,155 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 633245896, now seen corresponding path program 5 times [2021-11-21 01:20:32,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:32,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511001744] [2021-11-21 01:20:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:32,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-11-21 01:20:33,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511001744] [2021-11-21 01:20:33,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511001744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:33,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394621324] [2021-11-21 01:20:33,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:20:33,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:33,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:33,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0999deb5-9a8d-417a-a7ca-45c9b6178593/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process