./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:23:30,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:23:30,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:23:30,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:23:30,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:23:30,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:23:30,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:23:30,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:23:30,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:23:31,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:23:31,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:23:31,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:23:31,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:23:31,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:23:31,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:23:31,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:23:31,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:23:31,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:23:31,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:23:31,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:23:31,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:23:31,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:23:31,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:23:31,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:23:31,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:23:31,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:23:31,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:23:31,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:23:31,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:23:31,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:23:31,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:23:31,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:23:31,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:23:31,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:23:31,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:23:31,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:23:31,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:23:31,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:23:31,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:23:31,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:23:31,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:23:31,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:23:31,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:23:31,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:23:31,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:23:31,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:23:31,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:23:31,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:23:31,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:23:31,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:23:31,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:23:31,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:23:31,097 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:23:31,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:23:31,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:23:31,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:23:31,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:23:31,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:23:31,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:23:31,099 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:23:31,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:23:31,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:23:31,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:23:31,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:23:31,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:23:31,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:23:31,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:23:31,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:23:31,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:23:31,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:23:31,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:23:31,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:23:31,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:23:31,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:23:31,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:23:31,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:23:31,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:23:31,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:23:31,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:23:31,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:23:31,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:23:31,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:23:31,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:23:31,107 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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2021-11-21 01:23:31,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:23:31,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:23:31,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:23:31,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:23:31,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:23:31,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-21 01:23:31,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/cb142d107/abaf6a03e73a47cfa564a2df7126b8a4/FLAGd6728c487 [2021-11-21 01:23:31,907 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:23:31,907 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-21 01:23:31,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/cb142d107/abaf6a03e73a47cfa564a2df7126b8a4/FLAGd6728c487 [2021-11-21 01:23:32,299 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/cb142d107/abaf6a03e73a47cfa564a2df7126b8a4 [2021-11-21 01:23:32,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:23:32,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:23:32,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:23:32,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:23:32,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:23:32,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a375ab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32, skipping insertion in model container [2021-11-21 01:23:32,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:23:32,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:23:32,530 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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-21 01:23:32,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:23:32,541 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:23:32,562 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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-21 01:23:32,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:23:32,578 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:23:32,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32 WrapperNode [2021-11-21 01:23:32,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:23:32,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:23:32,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:23:32,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:23:32,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,617 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2021-11-21 01:23:32,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:23:32,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:23:32,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:23:32,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:23:32,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:23:32,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:23:32,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:23:32,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:23:32,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (1/1) ... [2021-11-21 01:23:32,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:23:32,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:32,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:23:32,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:23:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:23:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:23:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:23:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:23:32,746 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2021-11-21 01:23:32,747 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2021-11-21 01:23:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:23:32,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:23:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:23:32,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:23:32,845 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:23:32,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:23:32,979 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:23:33,009 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:23:33,009 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:23:33,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:23:33 BoogieIcfgContainer [2021-11-21 01:23:33,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:23:33,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:23:33,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:23:33,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:23:33,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:23:32" (1/3) ... [2021-11-21 01:23:33,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541c6c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:23:33, skipping insertion in model container [2021-11-21 01:23:33,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:32" (2/3) ... [2021-11-21 01:23:33,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541c6c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:23:33, skipping insertion in model container [2021-11-21 01:23:33,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:23:33" (3/3) ... [2021-11-21 01:23:33,020 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-11-21 01:23:33,025 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:23:33,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:23:33,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:23:33,079 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 01:23:33,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:23:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:23:33,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:33,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:33,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1096655878, now seen corresponding path program 1 times [2021-11-21 01:23:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:33,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373016316] [2021-11-21 01:23:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:33,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:23:33,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373016316] [2021-11-21 01:23:33,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373016316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:33,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:23:33,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:23:33,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613325156] [2021-11-21 01:23:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:23:33,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:23:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:23:33,401 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:23:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:33,447 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-21 01:23:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:23:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-21 01:23:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:33,458 INFO L225 Difference]: With dead ends: 36 [2021-11-21 01:23:33,458 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:23:33,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:23:33,465 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:33,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:23:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:23:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:23:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-21 01:23:33,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-21 01:23:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:33,507 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-21 01:23:33,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:23:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-21 01:23:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:23:33,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:33,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:33,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:23:33,513 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2109288894, now seen corresponding path program 1 times [2021-11-21 01:23:33,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:33,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512874443] [2021-11-21 01:23:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:33,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:23:33,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:33,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512874443] [2021-11-21 01:23:33,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512874443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:33,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801789737] [2021-11-21 01:23:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:33,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:33,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:33,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:33,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:23:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:23:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:23:33,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:23:33,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801789737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:33,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132151289] [2021-11-21 01:23:34,017 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:23:34,017 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:23:34,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:23:34,030 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:23:34,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:23:34,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,235 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-21 01:23:34,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-21 01:23:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,281 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 01:23:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:23:34,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 01:23:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:34,613 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 01:23:34,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 194 [2021-11-21 01:23:34,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:23:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 51 [2021-11-21 01:23:35,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:35,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-21 01:23:36,520 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 23 for LOIs [2021-11-21 01:23:36,631 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:23:37,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:23:37,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:23:37,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-21 01:23:37,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823846089] [2021-11-21 01:23:37,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:23:37,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:23:37,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:23:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:23:37,698 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:23:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:37,798 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-11-21 01:23:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:23:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 22 [2021-11-21 01:23:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:37,801 INFO L225 Difference]: With dead ends: 32 [2021-11-21 01:23:37,802 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 01:23:37,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:23:37,811 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:37,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:23:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 01:23:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 01:23:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-21 01:23:37,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2021-11-21 01:23:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:37,822 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-21 01:23:37,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:23:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-21 01:23:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:23:37,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:37,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:37,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:38,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:38,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1364270629, now seen corresponding path program 1 times [2021-11-21 01:23:38,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:38,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242540734] [2021-11-21 01:23:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:38,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:23:38,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242540734] [2021-11-21 01:23:38,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242540734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:38,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:23:38,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:23:38,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013247617] [2021-11-21 01:23:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:38,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:23:38,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:23:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:23:38,146 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:23:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:38,176 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-21 01:23:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:23:38,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-21 01:23:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:38,178 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:23:38,178 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 01:23:38,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:23:38,182 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:38,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:23:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 01:23:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-21 01:23:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-21 01:23:38,193 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2021-11-21 01:23:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:38,195 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-21 01:23:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:23:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-21 01:23:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:23:38,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:38,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:38,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:23:38,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash -642962702, now seen corresponding path program 1 times [2021-11-21 01:23:38,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:38,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961084606] [2021-11-21 01:23:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:38,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:23:38,339 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:23:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:23:38,405 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:23:38,412 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:23:38,414 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:23:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:23:38,419 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-21 01:23:38,423 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:23:38,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:23:38 BoogieIcfgContainer [2021-11-21 01:23:38,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:23:38,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:23:38,465 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:23:38,465 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:23:38,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:23:33" (3/4) ... [2021-11-21 01:23:38,469 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:23:38,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:23:38,470 INFO L158 Benchmark]: Toolchain (without parser) took 6166.98ms. Allocated memory was 90.2MB in the beginning and 163.6MB in the end (delta: 73.4MB). Free memory was 53.1MB in the beginning and 92.3MB in the end (delta: -39.2MB). Peak memory consumption was 34.6MB. Max. memory is 16.1GB. [2021-11-21 01:23:38,470 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 90.2MB. Free memory was 69.6MB in the beginning and 69.5MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:23:38,471 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.62ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.9MB in the beginning and 95.2MB in the end (delta: -42.3MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-11-21 01:23:38,471 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.64ms. Allocated memory is still 119.5MB. Free memory was 95.2MB in the beginning and 93.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:23:38,472 INFO L158 Benchmark]: Boogie Preprocessor took 28.82ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 92.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:23:38,472 INFO L158 Benchmark]: RCFGBuilder took 364.46ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 80.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:23:38,473 INFO L158 Benchmark]: TraceAbstraction took 5451.39ms. Allocated memory was 119.5MB in the beginning and 163.6MB in the end (delta: 44.0MB). Free memory was 80.1MB in the beginning and 92.3MB in the end (delta: -12.2MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2021-11-21 01:23:38,473 INFO L158 Benchmark]: Witness Printer took 3.95ms. Allocated memory is still 163.6MB. Free memory is still 92.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:23:38,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 90.2MB. Free memory was 69.6MB in the beginning and 69.5MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.62ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.9MB in the beginning and 95.2MB in the end (delta: -42.3MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.64ms. Allocated memory is still 119.5MB. Free memory was 95.2MB in the beginning and 93.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.82ms. Allocated memory is still 119.5MB. Free memory was 93.4MB in the beginning and 92.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.46ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 80.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5451.39ms. Allocated memory was 119.5MB in the beginning and 163.6MB in the end (delta: 44.0MB). Free memory was 80.1MB in the beginning and 92.3MB in the end (delta: -12.2MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. * Witness Printer took 3.95ms. Allocated memory is still 163.6MB. Free memory is still 92.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={3:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={3:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={3:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={3:0}] [L45] CALL, EXPR bAnd(x) VAL [N=2, x={3:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2, x={3:0}, x={3:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [i=2, N=2, x={3:0}, x={3:0}] [L24] COND FALSE !(i < N) [L27] return res; [L45] RET, EXPR bAnd(x) VAL [bAnd(x)=-4, i=2, N=2, x={3:0}] [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=-4, temp=-2, x={3:0}] [L48] CALL, EXPR bAnd(x) VAL [N=2, x={3:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-3, x={3:0}, x={3:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [i=2, N=2, x={3:0}, x={3:0}] [L24] COND FALSE !(i < N) [L27] return res; [L48] RET, EXPR bAnd(x) VAL [bAnd(x)=-5, i=2, N=2, ret=-4, temp=-2, x={3:0}] [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=2, i=0, N=2, ret=-4, ret2=-5, temp=-3, x={3:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/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 -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2021-11-21 01:23:41,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:23:41,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:23:41,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:23:41,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:23:41,619 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:23:41,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-21 01:23:41,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/5a28f4c81/13d51ecebc794609868fe52a527cb1e7/FLAG2eb2130cc [2021-11-21 01:23:42,219 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:23:42,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/sv-benchmarks/c/array-crafted/bAnd5.i [2021-11-21 01:23:42,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/5a28f4c81/13d51ecebc794609868fe52a527cb1e7/FLAG2eb2130cc [2021-11-21 01:23:42,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/data/5a28f4c81/13d51ecebc794609868fe52a527cb1e7 [2021-11-21 01:23:42,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:23:42,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:23:42,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:23:42,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:23:42,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:23:42,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:42,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2944f149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42, skipping insertion in model container [2021-11-21 01:23:42,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:42,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:23:42,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:23:42,829 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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-21 01:23:42,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:23:42,849 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:23:42,933 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_5c4b96e8-9d9c-44be-975c-f19619e98c9f/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-11-21 01:23:42,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:23:42,953 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:23:42,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42 WrapperNode [2021-11-21 01:23:42,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:23:42,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:23:42,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:23:42,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:23:42,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:42,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,011 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2021-11-21 01:23:43,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:23:43,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:23:43,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:23:43,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:23:43,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:23:43,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:23:43,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:23:43,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:23:43,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (1/1) ... [2021-11-21 01:23:43,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:23:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:43,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:23:43,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:23:43,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:23:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:23:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:23:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:23:43,172 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2021-11-21 01:23:43,173 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2021-11-21 01:23:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:23:43,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:23:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:23:43,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:23:43,286 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:23:43,287 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:23:43,521 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:23:43,528 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:23:43,528 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:23:43,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:23:43 BoogieIcfgContainer [2021-11-21 01:23:43,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:23:43,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:23:43,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:23:43,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:23:43,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:23:42" (1/3) ... [2021-11-21 01:23:43,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269bfa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:23:43, skipping insertion in model container [2021-11-21 01:23:43,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:23:42" (2/3) ... [2021-11-21 01:23:43,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269bfa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:23:43, skipping insertion in model container [2021-11-21 01:23:43,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:23:43" (3/3) ... [2021-11-21 01:23:43,538 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-11-21 01:23:43,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:23:43,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:23:43,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:23:43,606 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 01:23:43,606 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:23:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:23:43,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:43,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:43,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 310067850, now seen corresponding path program 1 times [2021-11-21 01:23:43,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:23:43,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571105681] [2021-11-21 01:23:43,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:43,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:23:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:23:43,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:23:43,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:23:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:23:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:23:43,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:23:44,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:23:44,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571105681] [2021-11-21 01:23:44,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571105681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:44,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:23:44,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:23:44,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399217841] [2021-11-21 01:23:44,040 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:44,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:23:44,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:23:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:23:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:23:44,073 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:23:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:44,092 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-11-21 01:23:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:23:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-11-21 01:23:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:44,101 INFO L225 Difference]: With dead ends: 51 [2021-11-21 01:23:44,101 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:23:44,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:23:44,108 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:44,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:23:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:23:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 01:23:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-21 01:23:44,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2021-11-21 01:23:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:44,161 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-21 01:23:44,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:23:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-21 01:23:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:23:44,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:44,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:44,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:44,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:23:44,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1979244726, now seen corresponding path program 1 times [2021-11-21 01:23:44,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:23:44,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298684818] [2021-11-21 01:23:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:44,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:23:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:23:44,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:23:44,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:23:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:23:44,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:23:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:23:44,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:23:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298684818] [2021-11-21 01:23:44,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298684818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:44,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:23:44,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:23:44,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687282786] [2021-11-21 01:23:44,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:23:44,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:23:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:23:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:23:44,751 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:23:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:44,814 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-11-21 01:23:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:23:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 29 [2021-11-21 01:23:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:44,821 INFO L225 Difference]: With dead ends: 44 [2021-11-21 01:23:44,822 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 01:23:44,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:23:44,831 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:44,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:23:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 01:23:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-21 01:23:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-21 01:23:44,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 29 [2021-11-21 01:23:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:44,850 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-21 01:23:44,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:23:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-21 01:23:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:23:44,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:44,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:44,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:45,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:23:45,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 64401422, now seen corresponding path program 1 times [2021-11-21 01:23:45,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:23:45,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326040529] [2021-11-21 01:23:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:45,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:23:45,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:23:45,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:23:45,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:23:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:23:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:23:45,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:23:45,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:23:45,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326040529] [2021-11-21 01:23:45,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326040529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:45,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1227555177] [2021-11-21 01:23:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:45,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:23:45,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:23:45,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:23:45,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-21 01:23:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:23:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:23:45,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:23:46,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1227555177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935458802] [2021-11-21 01:23:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:46,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:46,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:46,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:23:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:23:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:23:46,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:23:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935458802] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:46,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-21 01:23:46,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8, 7, 8, 5] total 14 [2021-11-21 01:23:46,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655658132] [2021-11-21 01:23:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:46,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:23:46,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:23:46,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:23:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:23:46,423 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:23:46,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:46,491 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-11-21 01:23:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:23:46,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-11-21 01:23:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:46,493 INFO L225 Difference]: With dead ends: 45 [2021-11-21 01:23:46,493 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:23:46,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:23:46,495 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:46,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:23:46,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:23:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-21 01:23:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-21 01:23:46,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2021-11-21 01:23:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:46,502 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-21 01:23:46,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:23:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-21 01:23:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:23:46,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:46,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:46,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:46,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:46,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:23:47,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:47,107 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash 343299212, now seen corresponding path program 1 times [2021-11-21 01:23:47,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:23:47,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847731730] [2021-11-21 01:23:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:47,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:23:47,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:23:47,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:23:47,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:23:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:23:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:23:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:23:47,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:23:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847731730] [2021-11-21 01:23:47,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847731730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502786838] [2021-11-21 01:23:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:47,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:23:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:23:47,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:23:47,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-21 01:23:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:23:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:23:48,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:23:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502786838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136534157] [2021-11-21 01:23:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:48,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:48,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:48,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:23:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:48,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:23:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:23:48,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:23:48,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136534157] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:48,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-21 01:23:48,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 7, 7, 7] total 15 [2021-11-21 01:23:48,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239409527] [2021-11-21 01:23:48,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:48,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:23:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:23:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:23:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:23:48,564 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:23:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:48,666 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-21 01:23:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:23:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-21 01:23:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:48,668 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:23:48,668 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:23:48,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:23:48,670 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:48,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:23:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:23:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-21 01:23:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:23:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-21 01:23:48,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2021-11-21 01:23:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:48,678 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-21 01:23:48,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:23:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-21 01:23:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:23:48,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:48,680 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:48,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:48,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-21 01:23:49,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:49,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:23:49,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:49,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1487527882, now seen corresponding path program 1 times [2021-11-21 01:23:49,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:23:49,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462597152] [2021-11-21 01:23:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:49,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:23:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:23:49,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:23:49,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:23:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 01:23:49,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:50,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:23:50,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-11-21 01:23:50,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:50,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:23:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-11-21 01:23:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:50,616 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-11-21 01:23:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 46 [2021-11-21 01:23:50,963 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:23:50,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 35 [2021-11-21 01:23:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:23:51,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:53,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 01:23:53,987 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:23:53,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-11-21 01:23:53,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-11-21 01:23:54,000 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:23:54,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-11-21 01:23:55,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 01:23:55,248 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:23:55,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-11-21 01:23:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:23:55,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:23:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462597152] [2021-11-21 01:23:55,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462597152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1559511299] [2021-11-21 01:23:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:55,836 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:23:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:23:55,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:23:55,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-21 01:23:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:56,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 01:23:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:56,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 01:23:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:56,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:23:56,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-11-21 01:23:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:56,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:23:56,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-11-21 01:23:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:56,596 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-11-21 01:23:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 46 [2021-11-21 01:23:56,682 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:23:56,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 35 [2021-11-21 01:23:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:23:56,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:08,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2021-11-21 01:24:08,589 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:24:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 651 treesize of output 533 [2021-11-21 01:24:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:24:09,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1559511299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:09,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585064385] [2021-11-21 01:24:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:09,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:09,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:09,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:24:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:10,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 01:24:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:24:11,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-11-21 01:24:11,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:11,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:11,512 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:24:11,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 59 [2021-11-21 01:24:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:12,105 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-11-21 01:24:12,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 46 [2021-11-21 01:24:12,206 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-21 01:24:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 35 [2021-11-21 01:24:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:24:12,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:26,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-11-21 01:24:26,954 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:24:26,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 1 [2021-11-21 01:24:46,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2021-11-21 01:24:46,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:24:46,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 1 [2021-11-21 01:24:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:24:46,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585064385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:24:46,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:24:46,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 21, 24, 24, 21] total 66 [2021-11-21 01:24:46,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278324728] [2021-11-21 01:24:46,611 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:24:46,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-21 01:24:46,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:24:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-21 01:24:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3854, Unknown=2, NotChecked=0, Total=4290 [2021-11-21 01:24:46,616 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 66 states, 58 states have (on average 1.706896551724138) internal successors, (99), 56 states have internal predecessors, (99), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-21 01:24:54,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:24:56,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:24:58,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:12,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:20,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:30,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:34,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:36,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:38,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:25:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:45,048 INFO L93 Difference]: Finished difference Result 118 states and 161 transitions. [2021-11-21 01:25:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-21 01:25:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 58 states have (on average 1.706896551724138) internal successors, (99), 56 states have internal predecessors, (99), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) Word has length 41 [2021-11-21 01:25:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:45,053 INFO L225 Difference]: With dead ends: 118 [2021-11-21 01:25:45,054 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:25:45,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 172 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=1289, Invalid=10050, Unknown=3, NotChecked=0, Total=11342 [2021-11-21 01:25:45,061 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 275 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:45,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 145 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1516 Invalid, 7 Unknown, 33 Unchecked, 32.2s Time] [2021-11-21 01:25:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:25:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-11-21 01:25:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-21 01:25:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2021-11-21 01:25:45,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 41 [2021-11-21 01:25:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:45,078 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2021-11-21 01:25:45,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 58 states have (on average 1.706896551724138) internal successors, (99), 56 states have internal predecessors, (99), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-21 01:25:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2021-11-21 01:25:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:25:45,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:45,081 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:45,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:45,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:45,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:45,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:25:45,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1372252520, now seen corresponding path program 2 times [2021-11-21 01:25:45,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:25:45,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790941951] [2021-11-21 01:25:45,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:25:45,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:25:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:25:45,687 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:25:45,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:25:45,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:25:45,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:25:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:25:45,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:25:46,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:25:46,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790941951] [2021-11-21 01:25:46,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790941951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113799711] [2021-11-21 01:25:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:25:46,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:25:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:25:46,294 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:25:46,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 01:25:46,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:25:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:46,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:25:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:25:46,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:25:47,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [113799711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:47,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932074356] [2021-11-21 01:25:47,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:25:47,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:47,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:47,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:47,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:25:47,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:25:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:25:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:25:47,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:25:48,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932074356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:48,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:25:48,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 11, 8, 8] total 37 [2021-11-21 01:25:48,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933682144] [2021-11-21 01:25:48,224 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:48,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 01:25:48,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:25:48,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 01:25:48,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:25:48,226 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 37 states, 36 states have (on average 3.111111111111111) internal successors, (112), 37 states have internal predecessors, (112), 7 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (16), 3 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-21 01:25:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:49,789 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2021-11-21 01:25:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:25:49,791 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.111111111111111) internal successors, (112), 37 states have internal predecessors, (112), 7 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (16), 3 states have call predecessors, (16), 7 states have call successors, (16) Word has length 47 [2021-11-21 01:25:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:49,792 INFO L225 Difference]: With dead ends: 110 [2021-11-21 01:25:49,792 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:25:49,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:25:49,795 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 240 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:49,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 212 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:25:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:25:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2021-11-21 01:25:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:25:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-11-21 01:25:49,806 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 47 [2021-11-21 01:25:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:49,807 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-11-21 01:25:49,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.111111111111111) internal successors, (112), 37 states have internal predecessors, (112), 7 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (16), 3 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-21 01:25:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-11-21 01:25:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:25:49,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:49,809 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:49,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:50,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:50,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-21 01:25:50,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:25:50,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash 715974184, now seen corresponding path program 3 times [2021-11-21 01:25:50,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:25:50,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040387314] [2021-11-21 01:25:50,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:25:50,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:25:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:25:50,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:25:50,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:25:50,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:25:50,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:50,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-21 01:25:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:51,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:51,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:25:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-11-21 01:25:57,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:57,216 INFO L354 Elim1Store]: treesize reduction 230, result has 6.5 percent of original size [2021-11-21 01:25:57,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 101 treesize of output 98 [2021-11-21 01:25:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,763 INFO L354 Elim1Store]: treesize reduction 79, result has 13.2 percent of original size [2021-11-21 01:25:57,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 91 treesize of output 72 [2021-11-21 01:25:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:58,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:58,182 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-11-21 01:25:58,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 75 [2021-11-21 01:26:00,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:26:00,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2021-11-21 01:26:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 51 refuted. 4 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:26:01,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:50,713 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((bAnd_~i~0 (_ BitVec 32)) (|v_ULTIMATE.start_main_~ret~0#1_BEFORE_CALL_16| (_ BitVec 32))) (or (exists ((v_bAnd_~i~0_221 (_ BitVec 32))) (and (let ((.cse4 (select |c_#memory_int| |c_bAnd_#in~x.base|))) (let ((.cse5 (select .cse4 |c_bAnd_#in~x.offset|))) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_BEFORE_CALL_16| ((_ extract 31 0) (let ((.cse2 (bvadd (_ bv8 32) |c_bAnd_#in~x.offset|)) (.cse1 (bvadd (_ bv4 32) |c_bAnd_#in~x.offset|))) (let ((.cse0 (store (let ((.cse3 (store .cse4 |c_bAnd_#in~x.offset| (select .cse4 .cse1)))) (store .cse3 .cse1 (select .cse3 .cse2))) (bvadd (_ bv4294967292 32) |c_bAnd_#in~x.offset| (bvmul c_~N~0 (_ bv4 32))) .cse5))) (bvand (bvand ((_ sign_extend 32) (select .cse0 |c_bAnd_#in~x.offset|)) ((_ sign_extend 32) (select .cse0 .cse1))) ((_ sign_extend 32) (select .cse0 .cse2)))))))) (not (= |v_ULTIMATE.start_main_~ret~0#1_BEFORE_CALL_16| ((_ extract 31 0) (let ((.cse6 (bvmul v_bAnd_~i~0_221 (_ bv4 32)))) (bvand (bvand ((_ sign_extend 32) .cse5) ((_ sign_extend 32) (select .cse4 (bvadd .cse6 |c_bAnd_#in~x.offset| (_ bv4294967288 32))))) ((_ sign_extend 32) (select .cse4 (bvadd (_ bv4294967292 32) .cse6 |c_bAnd_#in~x.offset|))))))))))) (not (bvslt v_bAnd_~i~0_221 c_~N~0)) (bvslt (bvadd (_ bv4294967295 32) v_bAnd_~i~0_221) c_~N~0))) (not (bvslt (bvadd bAnd_~i~0 (_ bv1 32)) c_~N~0)) (bvslt (bvadd (_ bv2 32) bAnd_~i~0) c_~N~0) (let ((.cse8 (select |c_#memory_int| |c_bAnd_#in~x.base|))) (let ((.cse7 (select .cse8 |c_bAnd_#in~x.offset|))) (and (= ((_ extract 31 0) (let ((.cse9 (bvmul bAnd_~i~0 (_ bv4 32)))) (bvand (bvand ((_ sign_extend 32) .cse7) ((_ sign_extend 32) (select .cse8 (bvadd .cse9 |c_bAnd_#in~x.offset|)))) ((_ sign_extend 32) (select .cse8 (bvadd (_ bv4 32) .cse9 |c_bAnd_#in~x.offset|)))))) |v_ULTIMATE.start_main_~ret~0#1_BEFORE_CALL_16|) (= |v_ULTIMATE.start_main_~ret~0#1_BEFORE_CALL_16| ((_ extract 31 0) (let ((.cse12 (bvadd (_ bv8 32) |c_bAnd_#in~x.offset|)) (.cse11 (bvadd (_ bv4 32) |c_bAnd_#in~x.offset|))) (let ((.cse10 (store (let ((.cse13 (store .cse8 |c_bAnd_#in~x.offset| (select .cse8 .cse11)))) (store .cse13 .cse11 (select .cse13 .cse12))) (bvadd (_ bv4294967292 32) |c_bAnd_#in~x.offset| (bvmul c_~N~0 (_ bv4 32))) .cse7))) (bvand (bvand ((_ sign_extend 32) (select .cse10 |c_bAnd_#in~x.offset|)) ((_ sign_extend 32) (select .cse10 .cse11))) ((_ sign_extend 32) (select .cse10 .cse12)))))))))))) (bvslt (_ bv3 32) c_~N~0)) is different from true [2021-11-21 01:28:04,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 446 treesize of output 350 [2021-11-21 01:28:04,344 INFO L354 Elim1Store]: treesize reduction 91, result has 33.6 percent of original size [2021-11-21 01:28:04,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2119205 treesize of output 1385074 [2021-11-21 01:29:14,252 WARN L227 SmtUtils]: Spent 1.17m on a formula simplification. DAG size of input: 867 DAG size of output: 863 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:29:14,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:29:14,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040387314] [2021-11-21 01:29:14,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:29:14,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [961362780] [2021-11-21 01:29:14,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:29:14,262 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:29:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:29:14,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:29:14,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 01:29:14,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:29:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:29:14,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:29:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:14,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:29:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:29,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:29,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:29:29,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-11-21 01:29:30,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:30,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:29:30,583 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:29:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-11-21 01:29:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:31,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:29:31,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-11-21 01:29:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:29:31,717 INFO L354 Elim1Store]: treesize reduction 72, result has 37.9 percent of original size [2021-11-21 01:29:31,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2021-11-21 01:29:41,072 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-21 01:29:41,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 95 [2021-11-21 01:29:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:29:41,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:30:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:30:30,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [961362780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:30:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98245497] [2021-11-21 01:30:30,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:30:30,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:30,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:30,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:30:31,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:30:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:30:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-21 01:30:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:31,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:30:31,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-11-21 01:30:40,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:40,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:40,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:30:40,430 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:30:40,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2021-11-21 01:30:41,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:41,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:30:41,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2021-11-21 01:30:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:30:41,736 INFO L354 Elim1Store]: treesize reduction 72, result has 37.9 percent of original size [2021-11-21 01:30:41,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2021-11-21 01:30:59,536 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-21 01:30:59,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 92 [2021-11-21 01:30:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 40 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:30:59,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:31:10,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 252 [2021-11-21 01:31:10,125 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 01:31:10,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1885122 treesize of output 1 [2021-11-21 01:31:14,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 138 [2021-11-21 01:31:14,843 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 01:31:14,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46952 treesize of output 1 [2021-11-21 01:31:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:31:14,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98245497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:31:14,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-21 01:31:14,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 29, 29] total 80 [2021-11-21 01:31:14,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652827858] [2021-11-21 01:31:14,860 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-21 01:31:14,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-21 01:31:14,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:31:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-21 01:31:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=12174, Unknown=59, NotChecked=226, Total=13340 [2021-11-21 01:31:14,865 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 80 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-21 01:31:46,014 WARN L227 SmtUtils]: Spent 28.40s on a formula simplification. DAG size of input: 188 DAG size of output: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:31:49,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:31:51,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:31:53,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:31:55,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:01,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:03,087 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:05,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:07,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:29,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:31,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:33,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:32:35,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:33:04,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:33:06,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:33:15,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:33:17,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:33:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:29,694 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-11-21 01:33:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-21 01:33:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 51 [2021-11-21 01:33:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:29,697 INFO L225 Difference]: With dead ends: 112 [2021-11-21 01:33:29,698 INFO L226 Difference]: Without dead ends: 96 [2021-11-21 01:33:29,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 160 SyntacticMatches, 7 SemanticMatches, 151 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 10659 ImplicationChecksByTransitivity, 265.8s TimeCoverageRelationStatistics Valid=1510, Invalid=21374, Unknown=72, NotChecked=300, Total=23256 [2021-11-21 01:33:29,704 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 135 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 42.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:29,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 264 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1820 Invalid, 15 Unknown, 214 Unchecked, 42.0s Time] [2021-11-21 01:33:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-21 01:33:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-11-21 01:33:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:33:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-11-21 01:33:29,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 51 [2021-11-21 01:33:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:29,721 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-11-21 01:33:29,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-21 01:33:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-11-21 01:33:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:33:29,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:29,725 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:29,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:29,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-21 01:33:30,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-21 01:33:30,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:33:30,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1840215844, now seen corresponding path program 4 times [2021-11-21 01:33:30,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:33:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779887866] [2021-11-21 01:33:30,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:30,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:33:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:33:30,332 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:33:30,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:33:30,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:30,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:30,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:33:30,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:33:30,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:33:31,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:33:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779887866] [2021-11-21 01:33:31,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779887866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [722727470] [2021-11-21 01:33:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:31,582 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:33:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:33:31,585 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:33:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-21 01:33:31,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:31,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:31,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:33:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:33:31,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:33:32,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [722727470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:32,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226218916] [2021-11-21 01:33:32,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:32,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:32,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:32,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:32,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:33:32,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:32,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:33:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:33:32,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 01:33:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226218916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:33,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:33:33,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 11, 11, 10] total 30 [2021-11-21 01:33:33,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649855931] [2021-11-21 01:33:33,238 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 01:33:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:33:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 01:33:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:33:33,239 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:33:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:35,207 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-11-21 01:33:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 01:33:35,209 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 55 [2021-11-21 01:33:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:35,211 INFO L225 Difference]: With dead ends: 77 [2021-11-21 01:33:35,211 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 01:33:35,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:33:35,212 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:35,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:33:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 01:33:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-21 01:33:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:33:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-21 01:33:35,219 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 55 [2021-11-21 01:33:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:35,220 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-21 01:33:35,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:33:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-21 01:33:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-21 01:33:35,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:35,222 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:35,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:35,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:35,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:35,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:33:35,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2073903416, now seen corresponding path program 5 times [2021-11-21 01:33:35,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:33:35,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474017688] [2021-11-21 01:33:35,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:33:35,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:33:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:33:35,829 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:33:35,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:33:35,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-21 01:33:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:33:35,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 69 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:33:36,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:33:37,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:33:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474017688] [2021-11-21 01:33:37,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474017688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800372357] [2021-11-21 01:33:37,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:33:37,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:33:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:33:37,386 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:33:37,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-21 01:33:38,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-21 01:33:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:33:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 86 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:33:38,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:33:39,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800372357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:39,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021536596] [2021-11-21 01:33:39,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:33:39,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:39,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:39,274 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:39,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 01:33:39,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-21 01:33:39,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:33:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 86 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:33:39,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:33:40,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021536596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:40,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:33:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12, 12, 9, 11] total 50 [2021-11-21 01:33:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123370567] [2021-11-21 01:33:40,998 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:40,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-21 01:33:40,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:33:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-21 01:33:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:33:41,001 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 3 states have call successors, (5), 3 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:33:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:43,176 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2021-11-21 01:33:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-21 01:33:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 3 states have call successors, (5), 3 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-11-21 01:33:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:43,179 INFO L225 Difference]: With dead ends: 116 [2021-11-21 01:33:43,179 INFO L226 Difference]: Without dead ends: 93 [2021-11-21 01:33:43,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=792, Invalid=3240, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:33:43,180 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:43,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 256 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 526 Invalid, 0 Unknown, 110 Unchecked, 1.1s Time] [2021-11-21 01:33:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-21 01:33:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2021-11-21 01:33:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:33:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-11-21 01:33:43,196 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 59 [2021-11-21 01:33:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:43,197 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-11-21 01:33:43,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 3 states have call successors, (5), 3 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:33:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-11-21 01:33:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 01:33:43,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:43,199 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:43,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:43,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-21 01:33:43,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:43,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:33:43,812 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2140154630, now seen corresponding path program 6 times [2021-11-21 01:33:43,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:33:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906579973] [2021-11-21 01:33:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 01:33:43,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:33:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:33:43,814 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:33:43,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 01:33:44,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-21 01:33:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:44,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-21 01:33:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:45,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2021-11-21 01:33:46,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,521 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:33:46,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2021-11-21 01:33:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:46,956 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-11-21 01:33:46,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 97 [2021-11-21 01:33:47,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:47,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 66 [2021-11-21 01:33:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:33:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:33:47,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:47,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2021-11-21 01:33:49,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:33:49,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2021-11-21 01:33:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 22 proven. 106 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:33:49,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 721 treesize of output 561 [2021-11-21 01:34:24,740 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:34:24,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1352791254 treesize of output 1 [2021-11-21 01:34:36,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 393 treesize of output 313 [2021-11-21 01:34:36,733 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:34:36,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25913322 treesize of output 1 [2021-11-21 01:34:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 13 proven. 104 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:34:36,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:34:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906579973] [2021-11-21 01:34:36,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906579973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1014844672] [2021-11-21 01:34:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 01:34:36,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:34:36,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:34:36,753 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:34:36,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-21 01:34:37,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-21 01:34:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:37,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-21 01:34:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:37,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 01:34:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:39,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2021-11-21 01:34:40,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,078 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:34:40,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2021-11-21 01:34:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,292 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-11-21 01:34:40,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 97 [2021-11-21 01:34:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:40,400 INFO L354 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2021-11-21 01:34:40,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 100 [2021-11-21 01:34:41,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:41,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:41,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:41,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2021-11-21 01:34:42,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:42,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2021-11-21 01:34:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:34:42,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:34:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1014844672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406206144] [2021-11-21 01:34:59,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-21 01:34:59,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:59,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:59,060 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:59,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c4b96e8-9d9c-44be-975c-f19619e98c9f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 01:35:00,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-21 01:35:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:00,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-21 01:35:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2021-11-21 01:35:19,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,086 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:35:19,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2021-11-21 01:35:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:19,966 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:35:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 89 [2021-11-21 01:35:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:20,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:20,985 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-21 01:35:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 89 [2021-11-21 01:35:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:22,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:22,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:22,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2021-11-21 01:35:23,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:23,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2021-11-21 01:35:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 22 proven. 90 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:35:23,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:26,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 721 treesize of output 561 [2021-11-21 01:35:27,372 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:35:27,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171149874 treesize of output 1 [2021-11-21 01:35:28,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 393 treesize of output 313 [2021-11-21 01:35:28,302 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:35:28,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7553502 treesize of output 1 [2021-11-21 01:35:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:35:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406206144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:28,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 33, 34, 35, 32] total 105 [2021-11-21 01:35:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241962821] [2021-11-21 01:35:28,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:28,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-21 01:35:28,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-21 01:35:28,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=10062, Unknown=18, NotChecked=0, Total=10920 [2021-11-21 01:35:28,326 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 105 states, 97 states have (on average 1.309278350515464) internal successors, (127), 93 states have internal predecessors, (127), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-21 01:37:31,536 WARN L227 SmtUtils]: Spent 1.95m on a formula simplification. DAG size of input: 264 DAG size of output: 198 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)