./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --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_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/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_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/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_bd9c5746-0ba2-4e21-bb97-8503ab91043f/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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:32:14,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:32:14,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:32:14,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:32:14,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:32:14,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:32:14,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:32:14,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:32:14,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:32:14,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:32:14,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:32:14,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:32:14,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:32:14,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:32:14,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:32:14,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:32:14,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:32:14,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:32:14,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:32:14,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:32:14,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:32:14,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:32:14,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:32:14,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:32:14,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:32:14,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:32:14,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:32:14,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:32:14,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:32:14,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:32:14,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:32:14,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:32:14,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:32:14,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:32:14,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:32:14,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:32:14,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:32:14,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:32:14,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:32:14,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:32:14,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:32:14,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:32:14,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:32:14,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:32:14,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:32:14,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:32:14,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:32:14,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:32:14,429 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:32:14,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:32:14,429 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:32:14,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:32:14,430 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:32:14,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:32:14,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:32:14,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:32:14,431 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:32:14,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:32:14,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:32:14,432 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:32:14,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:32:14,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:32:14,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:32:14,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:32:14,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:32:14,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:32:14,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:32:14,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:32:14,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:32:14,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:32:14,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:32:14,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:32:14,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:32:14,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:32:14,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:32:14,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:32:14,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:32:14,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:32:14,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:32:14,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:32:14,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:32:14,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:32:14,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:32:14,438 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_bd9c5746-0ba2-4e21-bb97-8503ab91043f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2021-11-21 00:32:14,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:32:14,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:32:14,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:32:14,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:32:14,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:32:14,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-11-21 00:32:14,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/data/d32e2e90e/58bee2044fbc43438b44d44dd3170cf2/FLAG14d81962b [2021-11-21 00:32:15,283 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:32:15,284 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-11-21 00:32:15,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/data/d32e2e90e/58bee2044fbc43438b44d44dd3170cf2/FLAG14d81962b [2021-11-21 00:32:15,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/data/d32e2e90e/58bee2044fbc43438b44d44dd3170cf2 [2021-11-21 00:32:15,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:32:15,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:32:15,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:32:15,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:32:15,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:32:15,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:32:15" (1/1) ... [2021-11-21 00:32:15,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f407fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:15, skipping insertion in model container [2021-11-21 00:32:15,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:32:15" (1/1) ... [2021-11-21 00:32:15,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:32:15,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:32:15,890 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_bd9c5746-0ba2-4e21-bb97-8503ab91043f/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-11-21 00:32:15,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:32:15,939 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:32:15,960 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_bd9c5746-0ba2-4e21-bb97-8503ab91043f/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-11-21 00:32:15,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:32:16,004 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:32:16,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16 WrapperNode [2021-11-21 00:32:16,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:32:16,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:32:16,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:32:16,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:32:16,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,069 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-11-21 00:32:16,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:32:16,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:32:16,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:32:16,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:32:16,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:32:16,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:32:16,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:32:16,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:32:16,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (1/1) ... [2021-11-21 00:32:16,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:32:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:16,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:32:16,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:32:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:32:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:32:16,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:32:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:32:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:32:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:32:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:32:16,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:32:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:32:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:32:16,296 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:32:16,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:32:16,455 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:32:16,517 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:32:16,518 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:32:16,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:32:16 BoogieIcfgContainer [2021-11-21 00:32:16,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:32:16,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:32:16,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:32:16,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:32:16,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:32:15" (1/3) ... [2021-11-21 00:32:16,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d196a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:32:16, skipping insertion in model container [2021-11-21 00:32:16,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:32:16" (2/3) ... [2021-11-21 00:32:16,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d196a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:32:16, skipping insertion in model container [2021-11-21 00:32:16,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:32:16" (3/3) ... [2021-11-21 00:32:16,531 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2021-11-21 00:32:16,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:32:16,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:32:16,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:32:16,599 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 00:32:16,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:32:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:32:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:32:16,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:16,638 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:16,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:16,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1232094444, now seen corresponding path program 1 times [2021-11-21 00:32:16,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:16,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821944283] [2021-11-21 00:32:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:16,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:32:17,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:17,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821944283] [2021-11-21 00:32:17,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821944283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:17,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:32:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:32:17,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381479713] [2021-11-21 00:32:17,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:17,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:32:17,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:32:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:32:17,107 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:32:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:17,219 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-21 00:32:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:32:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-21 00:32:17,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:17,241 INFO L225 Difference]: With dead ends: 25 [2021-11-21 00:32:17,241 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 00:32:17,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:32:17,255 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:17,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:32:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 00:32:17,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-21 00:32:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:32:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-21 00:32:17,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2021-11-21 00:32:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:17,310 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-21 00:32:17,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:32:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-21 00:32:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:32:17,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:17,312 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:17,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:32:17,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -460272811, now seen corresponding path program 1 times [2021-11-21 00:32:17,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078773771] [2021-11-21 00:32:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:17,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:32:17,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:17,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078773771] [2021-11-21 00:32:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078773771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:17,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:32:17,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:32:17,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280708478] [2021-11-21 00:32:17,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:17,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:32:17,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:32:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:32:17,413 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:32:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:17,506 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-11-21 00:32:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:32:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-21 00:32:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:17,510 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:32:17,510 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:32:17,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:32:17,512 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:17,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:32:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:32:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-21 00:32:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:32:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 00:32:17,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2021-11-21 00:32:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:17,525 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 00:32:17,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:32:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 00:32:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:32:17,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:17,536 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:17,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:32:17,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:17,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1912132504, now seen corresponding path program 1 times [2021-11-21 00:32:17,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:17,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238619075] [2021-11-21 00:32:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:17,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:32:18,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:18,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238619075] [2021-11-21 00:32:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238619075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076192542] [2021-11-21 00:32:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:18,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:18,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:18,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:18,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:32:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:18,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:32:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:18,455 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-21 00:32:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-21 00:32:18,537 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 15 treesize of output 7 [2021-11-21 00:32:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:32:18,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:32:20,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:32:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 55 treesize of output 39 [2021-11-21 00:32:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:32:20,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076192542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:32:20,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100178844] [2021-11-21 00:32:20,930 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:32:20,930 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:32:20,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:32:20,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:32:20,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:32:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,830 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:32:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:32:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:32:58,163 INFO L354 Elim1Store]: treesize reduction 162, result has 30.2 percent of original size [2021-11-21 00:32:58,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 193 treesize of output 237 [2021-11-21 00:32:59,009 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:32:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:32:59,055 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:32:59,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:32:59,427 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:32:59,445 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:00,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:33:00,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:33:00,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-11-21 00:33:00,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717515918] [2021-11-21 00:33:00,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:33:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:33:00,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:33:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=912, Unknown=1, NotChecked=0, Total=1056 [2021-11-21 00:33:00,172 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:33:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:00,397 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-21 00:33:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:33:00,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2021-11-21 00:33:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:00,399 INFO L225 Difference]: With dead ends: 26 [2021-11-21 00:33:00,399 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:33:00,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=159, Invalid=1030, Unknown=1, NotChecked=0, Total=1190 [2021-11-21 00:33:00,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:00,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 97 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 173 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-11-21 00:33:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:33:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-11-21 00:33:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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 00:33:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-21 00:33:00,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 21 [2021-11-21 00:33:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:00,409 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-21 00:33:00,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:33:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-21 00:33:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:33:00,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:00,410 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:00,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:33:00,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 00:33:00,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -853929431, now seen corresponding path program 2 times [2021-11-21 00:33:00,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:00,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713495162] [2021-11-21 00:33:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:00,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:33:00,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:00,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713495162] [2021-11-21 00:33:00,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713495162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:00,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069922049] [2021-11-21 00:33:00,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:33:00,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:00,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:00,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:00,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:33:00,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:33:00,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:33:00,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:33:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:33:00,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:33:00,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069922049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:33:00,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829094854] [2021-11-21 00:33:00,868 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:33:00,868 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:00,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:00,869 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:00,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,447 INFO L354 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2021-11-21 00:33:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2021-11-21 00:33:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:01,570 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:33:01,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:33:36,162 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:33:36,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 280 [2021-11-21 00:33:36,606 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:33:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:33:36,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:33:36,915 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:37,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:33:37,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:33:37,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-21 00:33:37,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407122796] [2021-11-21 00:33:37,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:33:37,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:33:37,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:37,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:33:37,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:33:37,511 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:33:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:37,599 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-11-21 00:33:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:33:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-11-21 00:33:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:37,601 INFO L225 Difference]: With dead ends: 38 [2021-11-21 00:33:37,602 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 00:33:37,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:33:37,604 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:37,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:33:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 00:33:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-21 00:33:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:33:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-21 00:33:37,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 22 [2021-11-21 00:33:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:37,611 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-21 00:33:37,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:33:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-21 00:33:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:33:37,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:37,613 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:37,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:33:37,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:37,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1239390197, now seen corresponding path program 3 times [2021-11-21 00:33:37,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:37,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808531612] [2021-11-21 00:33:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:37,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:33:37,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:37,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808531612] [2021-11-21 00:33:37,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808531612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645300529] [2021-11-21 00:33:37,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:33:37,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:37,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:37,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:33:37,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:33:37,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:33:37,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:33:37,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:33:38,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:33:38,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645300529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:33:38,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951155974] [2021-11-21 00:33:38,064 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:33:38,064 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:38,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:38,065 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:38,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,580 INFO L354 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2021-11-21 00:33:38,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2021-11-21 00:33:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:38,718 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:33:38,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:34:09,461 INFO L354 Elim1Store]: treesize reduction 162, result has 30.2 percent of original size [2021-11-21 00:34:09,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 193 treesize of output 237 [2021-11-21 00:34:10,503 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:34:10,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:34:10,538 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:34:10,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:34:10,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:34:10,838 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:11,429 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:11,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:11,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-21 00:34:11,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123675147] [2021-11-21 00:34:11,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:11,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:34:11,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:34:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:34:11,431 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 00:34:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:11,563 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-21 00:34:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:34:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2021-11-21 00:34:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:11,565 INFO L225 Difference]: With dead ends: 26 [2021-11-21 00:34:11,565 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:34:11,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:34:11,567 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:11,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 59 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:34:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:34:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 00:34:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:34:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-21 00:34:11,575 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 27 [2021-11-21 00:34:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:11,575 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-21 00:34:11,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 00:34:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-21 00:34:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:34:11,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:11,577 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:11,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:11,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:11,781 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash -234104468, now seen corresponding path program 4 times [2021-11-21 00:34:11,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:11,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794537747] [2021-11-21 00:34:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:11,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:34:12,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:12,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794537747] [2021-11-21 00:34:12,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794537747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:12,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118980086] [2021-11-21 00:34:12,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:34:12,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:12,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:12,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:12,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:34:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 00:34:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:12,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 00:34:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:12,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-21 00:34:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:12,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:12,808 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-11-21 00:34:12,809 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 4 case distinctions, treesize of input 59 treesize of output 48 [2021-11-21 00:34:12,977 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:34:12,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 24 [2021-11-21 00:34:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:13,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:13,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:34:13,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 337 treesize of output 291 [2021-11-21 00:34:13,691 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-21 00:34:13,691 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 323 treesize of output 256 [2021-11-21 00:34:15,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118980086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16346278] [2021-11-21 00:34:15,812 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:34:15,812 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:15,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:15,813 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:15,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:16,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:16,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:16,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:16,318 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:34:16,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:34:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:35:00,028 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:35:00,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 280 [2021-11-21 00:35:00,374 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:35:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:35:00,656 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:35:00,671 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:01,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:35:01,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:35:01,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-11-21 00:35:01,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108035931] [2021-11-21 00:35:01,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:35:01,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:35:01,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:35:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:35:01,626 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:35:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:02,428 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-11-21 00:35:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:35:02,429 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2021-11-21 00:35:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:02,430 INFO L225 Difference]: With dead ends: 32 [2021-11-21 00:35:02,430 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 00:35:02,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=310, Invalid=2770, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 00:35:02,432 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:02,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 282 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2021-11-21 00:35:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 00:35:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-21 00:35:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:35:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-21 00:35:02,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 28 [2021-11-21 00:35:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:02,440 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-21 00:35:02,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:35:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-21 00:35:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:35:02,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:02,442 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:02,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:02,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:02,657 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1332201173, now seen corresponding path program 5 times [2021-11-21 00:35:02,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:02,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550416155] [2021-11-21 00:35:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:02,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:35:02,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:02,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550416155] [2021-11-21 00:35:02,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550416155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:02,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190214828] [2021-11-21 00:35:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:35:02,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:02,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:02,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:35:02,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:35:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:35:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:35:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:35:02,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:35:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190214828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:35:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109225477] [2021-11-21 00:35:02,962 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:35:02,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:02,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:02,962 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:02,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,419 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:35:03,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:35:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:35:44,214 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:35:44,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 211 treesize of output 259 [2021-11-21 00:35:44,986 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:35:44,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:35:45,278 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:35:45,292 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:45,965 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:35:45,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:35:45,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-11-21 00:35:45,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558291335] [2021-11-21 00:35:45,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:35:45,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:35:45,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:35:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:35:45,967 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 00:35:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:46,122 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-11-21 00:35:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:35:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-11-21 00:35:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:46,125 INFO L225 Difference]: With dead ends: 46 [2021-11-21 00:35:46,125 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 00:35:46,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:35:46,126 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:46,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:35:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 00:35:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-11-21 00:35:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:35:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-21 00:35:46,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 29 [2021-11-21 00:35:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:46,137 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-21 00:35:46,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 00:35:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-21 00:35:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:35:46,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:46,142 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:46,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:46,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:35:46,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:46,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1861489079, now seen corresponding path program 6 times [2021-11-21 00:35:46,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:46,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676291424] [2021-11-21 00:35:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:46,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:35:46,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676291424] [2021-11-21 00:35:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676291424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419111959] [2021-11-21 00:35:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:35:46,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:46,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:46,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:35:46,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:35:46,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:35:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:35:46,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:35:46,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:35:46,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419111959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:35:46,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495328605] [2021-11-21 00:35:46,691 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:35:46,691 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:46,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:46,692 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:46,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:47,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:47,202 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:35:47,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:35:47,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:47,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:36:27,563 INFO L354 Elim1Store]: treesize reduction 162, result has 30.2 percent of original size [2021-11-21 00:36:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 193 treesize of output 237 [2021-11-21 00:36:27,818 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:36:27,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:36:27,852 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:36:27,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:36:28,131 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:36:28,146 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:28,745 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:28,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:36:28,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-21 00:36:28,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065777218] [2021-11-21 00:36:28,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:28,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:36:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:36:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:36:28,747 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-21 00:36:28,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:28,904 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-21 00:36:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:36:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2021-11-21 00:36:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:28,905 INFO L225 Difference]: With dead ends: 31 [2021-11-21 00:36:28,906 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 00:36:28,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:36:28,907 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:28,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 00:36:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-21 00:36:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:36:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-21 00:36:28,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 34 [2021-11-21 00:36:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:28,913 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-21 00:36:28,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-21 00:36:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-21 00:36:28,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:36:28,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:28,915 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:28,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 00:36:29,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:36:29,121 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1872081512, now seen corresponding path program 7 times [2021-11-21 00:36:29,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:29,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703717105] [2021-11-21 00:36:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:29,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:36:29,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:29,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703717105] [2021-11-21 00:36:29,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703717105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:29,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935831054] [2021-11-21 00:36:29,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:36:29,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:29,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:29,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:29,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:36:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 00:36:29,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:29,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 00:36:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,338 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 0 case distinctions, treesize of input 45 treesize of output 46 [2021-11-21 00:36:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2021-11-21 00:36:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:30,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:30,506 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-11-21 00:36:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 97 treesize of output 74 [2021-11-21 00:36:30,845 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:36:30,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 39 [2021-11-21 00:36:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:36:30,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:32,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:32,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 8085 treesize of output 6759 [2021-11-21 00:36:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:34,820 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-11-21 00:36:34,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 5928 treesize of output 4355 [2021-11-21 00:37:40,269 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_131 Int) (v_arrayElimCell_132 Int) (v_arrayElimCell_129 Int)) (let ((.cse42 (* 4 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse20 (= 0 (+ .cse42 4)))) (or (let ((.cse23 (= |c_ULTIMATE.start_main_~#b~0#1.base| |c_ULTIMATE.start_main_~#a~0#1.base|)) (.cse41 (= |c_ULTIMATE.start_main_~#b~0#1.offset| (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))) (let ((.cse43 (+ 3 |c_ULTIMATE.start_main_~k~0#1| (* 3 v_arrayElimCell_131))) (.cse25 (= |c_ULTIMATE.start_main_~#b~0#1.offset| (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8))) (.cse38 (not .cse41)) (.cse31 (not .cse23))) (let ((.cse35 (* 3 v_arrayElimCell_132)) (.cse27 (* 2 v_arrayElimCell_132)) (.cse22 (or .cse38 .cse31)) (.cse28 (* 4 v_arrayElimCell_129)) (.cse30 (not .cse25)) (.cse19 (= .cse42 0)) (.cse33 (and .cse41 .cse23 (<= (* 6 v_arrayElimCell_132) .cse43))) (.cse34 (< v_arrayElimCell_129 v_arrayElimCell_132)) (.cse21 (and .cse41 .cse23 (<= (* 6 v_arrayElimCell_129) .cse43))) (.cse32 (<= v_arrayElimCell_132 v_arrayElimCell_129)) (.cse26 (* 3 v_arrayElimCell_129)) (.cse29 (* 2 v_arrayElimCell_131))) (and (forall ((|v_ULTIMATE.start_main_~j~0#1_63| Int)) (or (< v_arrayElimCell_132 |v_ULTIMATE.start_main_~j~0#1_63|) (let ((.cse12 (* 4 |c_ULTIMATE.start_main_~i~0#1|)) (.cse6 (= |c_ULTIMATE.start_main_~#b~0#1.base| |c_ULTIMATE.start_main_~#a~0#1.base|)) (.cse0 (= |c_ULTIMATE.start_main_~#b~0#1.offset| (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8))) (.cse4 (= |c_ULTIMATE.start_main_~#b~0#1.offset| (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4))) (.cse15 (* 2 v_arrayElimCell_131))) (let ((.cse3 (+ 3 |c_ULTIMATE.start_main_~k~0#1| (* 3 v_arrayElimCell_131))) (.cse8 (+ .cse15 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132)) (.cse1 (not .cse4)) (.cse9 (not .cse0)) (.cse2 (not .cse6)) (.cse11 (< v_arrayElimCell_131 |v_ULTIMATE.start_main_~j~0#1_63|)) (.cse13 (= .cse12 0)) (.cse10 (+ 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132 v_arrayElimCell_131))) (and (or (<= |v_ULTIMATE.start_main_~j~0#1_63| v_arrayElimCell_129) (let ((.cse7 (* 4 v_arrayElimCell_129))) (and (or (let ((.cse5 (<= (* 2 v_arrayElimCell_129) .cse10))) (and (or .cse0 (and (or .cse1 .cse2 (<= (* 6 v_arrayElimCell_129) .cse3)) (or .cse4 .cse5))) (or .cse6 .cse5) (or (<= .cse7 .cse8) .cse9 .cse2))) .cse11 (= .cse12 4)) (or .cse13 (let ((.cse14 (<= (* 3 v_arrayElimCell_129) (+ |v_ULTIMATE.start_main_~j~0#1_63| 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132 v_arrayElimCell_131)))) (and (or .cse6 .cse14) (or (<= .cse7 (+ .cse15 |v_ULTIMATE.start_main_~j~0#1_63| 3 |c_ULTIMATE.start_main_~k~0#1|)) .cse9 .cse2) (or .cse4 .cse14 .cse0))))))) (or (let ((.cse17 (* 3 |v_ULTIMATE.start_main_~j~0#1_63|))) (let ((.cse16 (<= .cse17 (+ 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132 v_arrayElimCell_131 v_arrayElimCell_129))) (.cse18 (<= (* 2 |v_ULTIMATE.start_main_~j~0#1_63|) .cse10))) (and (or (and .cse4 (<= (* 6 |v_ULTIMATE.start_main_~j~0#1_63|) .cse3)) (= 0 (+ .cse12 4)) (and (or (<= (* 4 |v_ULTIMATE.start_main_~j~0#1_63|) .cse8) .cse11 .cse9 .cse2) (or .cse11 .cse0 .cse16) (or .cse1 .cse11 .cse2) (or .cse13 (and (or (<= .cse17 (+ .cse15 3 |c_ULTIMATE.start_main_~k~0#1|)) .cse9 .cse2) (or .cse18 .cse0))))) (or .cse6 (and (or .cse11 .cse16) (or .cse13 .cse18)))))) (< v_arrayElimCell_129 |v_ULTIMATE.start_main_~j~0#1_63|))))))) (or .cse19 .cse20 (and (or (and (or .cse21 (let ((.cse24 (<= .cse26 (+ |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_131 4 .cse27)))) (and .cse22 (or .cse23 .cse24) (or .cse25 .cse24)))) (or (<= .cse28 (+ .cse29 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132 4)) .cse30 .cse31)) .cse32) (or .cse33 .cse34 (let ((.cse36 (<= v_arrayElimCell_132 (+ |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_131 4)))) (and .cse22 (or (<= .cse35 (+ .cse29 |c_ULTIMATE.start_main_~k~0#1| 4)) .cse30 .cse31) (or .cse23 .cse36) (or .cse36 .cse25)))))) (or (let ((.cse39 (+ .cse29 3 |c_ULTIMATE.start_main_~k~0#1|))) (and (or (let ((.cse40 (or .cse30 .cse31)) (.cse37 (<= v_arrayElimCell_131 v_arrayElimCell_132))) (and (or .cse33 (and (or .cse37 .cse38 .cse31) (or .cse37 (and (<= .cse35 .cse39) .cse23 .cse25) (and (<= .cse27 (+ 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_131 v_arrayElimCell_129)) .cse40))) .cse34) (or (and (or .cse21 (and .cse22 (<= (* 2 v_arrayElimCell_129) (+ 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132 v_arrayElimCell_131)))) .cse40) .cse32 (and .cse23 (<= .cse28 (+ .cse29 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_132)) .cse25) .cse37) (or .cse41 .cse19))) .cse20) (or .cse19 (and (or .cse33 (and .cse23 (<= (* 4 v_arrayElimCell_132) (+ .cse29 3 |c_ULTIMATE.start_main_~k~0#1| v_arrayElimCell_129)) .cse25) .cse34) (or .cse21 .cse32 (and .cse23 (<= .cse26 .cse39) .cse25)))))) (= .cse42 4)))))) (and (not (= v_arrayElimCell_132 v_arrayElimCell_131)) .cse20) (and (not (= v_arrayElimCell_131 v_arrayElimCell_129)) (= (+ .cse42 8) 0)))))) is different from false [2021-11-21 00:38:08,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935831054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:08,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228063275] [2021-11-21 00:38:08,424 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:38:08,424 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:08,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:08,425 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:08,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:08,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:08,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:08,883 INFO L354 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2021-11-21 00:38:08,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2021-11-21 00:38:08,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:08,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:08,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:09,020 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:38:09,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:38:47,505 INFO L354 Elim1Store]: treesize reduction 162, result has 30.2 percent of original size [2021-11-21 00:38:47,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 258 [2021-11-21 00:38:48,054 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:38:48,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:38:48,088 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:38:48,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:38:48,418 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:38:48,436 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:49,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:49,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:38:49,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-11-21 00:38:49,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471899620] [2021-11-21 00:38:49,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:49,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 00:38:49,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 00:38:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2436, Unknown=1, NotChecked=100, Total=2756 [2021-11-21 00:38:49,708 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 00:38:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:50,982 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-11-21 00:38:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:38:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 35 [2021-11-21 00:38:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:50,984 INFO L225 Difference]: With dead ends: 38 [2021-11-21 00:38:50,984 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 00:38:50,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=380, Invalid=3655, Unknown=1, NotChecked=124, Total=4160 [2021-11-21 00:38:50,986 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:50,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 372 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2021-11-21 00:38:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 00:38:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-21 00:38:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:38:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-21 00:38:50,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 35 [2021-11-21 00:38:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:50,994 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-21 00:38:50,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 00:38:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-21 00:38:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:38:50,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:50,996 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:51,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:51,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:51,201 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2094520361, now seen corresponding path program 8 times [2021-11-21 00:38:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:51,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153653727] [2021-11-21 00:38:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:51,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:38:51,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153653727] [2021-11-21 00:38:51,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153653727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075389405] [2021-11-21 00:38:51,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:38:51,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:51,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:51,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:51,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:38:51,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:38:51,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:38:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:38:51,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:38:51,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:38:51,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075389405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:38:51,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834676984] [2021-11-21 00:38:51,543 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:38:51,543 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:51,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:51,543 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:51,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:51,987 INFO L354 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2021-11-21 00:38:51,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2021-11-21 00:38:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,107 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:38:52,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:39:34,662 INFO L354 Elim1Store]: treesize reduction 162, result has 30.2 percent of original size [2021-11-21 00:39:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 193 treesize of output 237 [2021-11-21 00:39:35,583 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:39:35,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:39:35,633 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:39:35,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:39:35,990 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:39:36,006 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:39:36,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:39:36,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:39:36,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2021-11-21 00:39:36,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702578847] [2021-11-21 00:39:36,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:39:36,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:39:36,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:39:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:39:36,710 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-21 00:39:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:36,868 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-11-21 00:39:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:39:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2021-11-21 00:39:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:36,870 INFO L225 Difference]: With dead ends: 54 [2021-11-21 00:39:36,870 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:39:36,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:39:36,871 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:36,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:39:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:39:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-11-21 00:39:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:39:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-21 00:39:36,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 36 [2021-11-21 00:39:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:36,880 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-21 00:39:36,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-21 00:39:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-21 00:39:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:39:36,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:36,881 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:36,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:37,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:39:37,109 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1854278795, now seen corresponding path program 9 times [2021-11-21 00:39:37,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:37,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025018947] [2021-11-21 00:39:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:37,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:39:37,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:37,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025018947] [2021-11-21 00:39:37,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025018947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:37,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627088486] [2021-11-21 00:39:37,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:39:37,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:37,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:37,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:39:37,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:39:37,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:39:37,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:39:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 00:39:37,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:39:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 00:39:37,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627088486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:39:37,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744665738] [2021-11-21 00:39:37,479 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:39:37,479 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:39:37,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:39:37,480 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:39:37,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:39:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,937 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:39:37,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:39:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:37,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:40:17,908 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:40:17,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 280 [2021-11-21 00:40:18,276 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:40:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:40:18,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:40:18,600 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:40:19,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:40:19,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:40:19,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-21 00:40:19,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301169361] [2021-11-21 00:40:19,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:40:19,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:40:19,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:40:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:40:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:40:19,237 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:40:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:40:19,487 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-21 00:40:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:40:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 41 [2021-11-21 00:40:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:40:19,489 INFO L225 Difference]: With dead ends: 36 [2021-11-21 00:40:19,489 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 00:40:19,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 00:40:19,490 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:40:19,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:40:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 00:40:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-21 00:40:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:40:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-21 00:40:19,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 41 [2021-11-21 00:40:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:40:19,499 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-21 00:40:19,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:40:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-21 00:40:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 00:40:19,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:40:19,501 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:40:19,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:40:19,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:40:19,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:40:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:40:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1648562708, now seen corresponding path program 10 times [2021-11-21 00:40:19,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:40:19,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975789342] [2021-11-21 00:40:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:40:19,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:40:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:40:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:40:20,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:40:20,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975789342] [2021-11-21 00:40:20,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975789342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:40:20,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173940116] [2021-11-21 00:40:20,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:40:20,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:40:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:40:20,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:40:20,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:40:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:40:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 00:40:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:40:21,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 00:40:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:21,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 68 [2021-11-21 00:40:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:21,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2021-11-21 00:40:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 108 [2021-11-21 00:40:21,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:21,983 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-11-21 00:40:21,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 143 treesize of output 104 [2021-11-21 00:40:22,507 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-21 00:40:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 146 treesize of output 50 [2021-11-21 00:40:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 00:40:22,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:40:33,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:40:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1622179 treesize of output 1337977 [2021-11-21 00:40:34,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:40:34,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977415210] [2021-11-21 00:40:34,083 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:40:34,084 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:40:34,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:40:34,084 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:40:34,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:40:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:34,545 INFO L354 Elim1Store]: treesize reduction 70, result has 35.2 percent of original size [2021-11-21 00:40:34,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2021-11-21 00:40:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:34,640 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:40:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:41:18,736 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:41:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 280 [2021-11-21 00:41:19,200 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:41:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:41:19,490 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:41:19,507 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:41:22,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:41:22,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:22,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-21 00:41:22,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246446349] [2021-11-21 00:41:22,185 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:41:22,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 00:41:22,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:22,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 00:41:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3607, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 00:41:22,187 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 22 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:41:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:24,317 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-11-21 00:41:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 00:41:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2021-11-21 00:41:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:24,318 INFO L225 Difference]: With dead ends: 44 [2021-11-21 00:41:24,318 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 00:41:24,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=425, Invalid=5275, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 00:41:24,321 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:24,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 89 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:41:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 00:41:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-11-21 00:41:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:41:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-21 00:41:24,331 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 42 [2021-11-21 00:41:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:24,331 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-21 00:41:24,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:41:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-21 00:41:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 00:41:24,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:24,333 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:24,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:24,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:41:24,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash 433668693, now seen corresponding path program 11 times [2021-11-21 00:41:24,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:24,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482695479] [2021-11-21 00:41:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:24,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:41:24,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:24,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482695479] [2021-11-21 00:41:24,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482695479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:24,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014146525] [2021-11-21 00:41:24,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:41:24,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:24,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:24,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:41:24,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:41:24,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:41:24,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:41:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 00:41:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 00:41:24,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014146525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:41:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545792042] [2021-11-21 00:41:24,980 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:41:24,981 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:41:24,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:41:24,981 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:41:24,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:41:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:25,527 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:41:25,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:41:25,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:25,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:42:15,958 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:42:15,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 211 treesize of output 259 [2021-11-21 00:42:16,552 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:42:16,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:42:16,841 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:42:16,856 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:17,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:42:17,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:42:17,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2021-11-21 00:42:17,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875789683] [2021-11-21 00:42:17,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:42:17,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:42:17,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:42:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:42:17,558 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:42:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:17,741 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-11-21 00:42:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:42:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-11-21 00:42:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:17,742 INFO L225 Difference]: With dead ends: 62 [2021-11-21 00:42:17,742 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 00:42:17,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 00:42:17,744 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:17,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:42:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 00:42:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-11-21 00:42:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:42:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-21 00:42:17,754 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 43 [2021-11-21 00:42:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:17,755 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-21 00:42:17,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:42:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-21 00:42:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:42:17,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:17,757 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:17,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:17,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:17,976 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 127792201, now seen corresponding path program 12 times [2021-11-21 00:42:17,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216947661] [2021-11-21 00:42:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:17,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-21 00:42:18,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216947661] [2021-11-21 00:42:18,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216947661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:42:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208829863] [2021-11-21 00:42:18,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:42:18,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:18,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:18,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:42:18,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:42:18,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:42:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:42:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 00:42:18,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 00:42:18,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208829863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:18,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326013536] [2021-11-21 00:42:18,489 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 00:42:18,489 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:18,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:18,490 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:18,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:19,142 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 00:42:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 00:42:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:19,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 41 [2021-11-21 00:43:10,612 INFO L354 Elim1Store]: treesize reduction 228, result has 25.7 percent of original size [2021-11-21 00:43:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 232 treesize of output 280 [2021-11-21 00:43:11,068 INFO L354 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2021-11-21 00:43:11,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-11-21 00:43:11,411 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-21 00:43:11,426 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:12,068 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:12,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:43:12,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-21 00:43:12,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009178316] [2021-11-21 00:43:12,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:12,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:43:12,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:43:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:43:12,071 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-21 00:43:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:12,384 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-11-21 00:43:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:43:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2021-11-21 00:43:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:12,386 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:43:12,386 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:43:12,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:43:12,387 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:12,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 103 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:43:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-21 00:43:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:43:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-21 00:43:12,402 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2021-11-21 00:43:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:12,403 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-21 00:43:12,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-21 00:43:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-21 00:43:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 00:43:12,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:12,404 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:12,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:43:12,629 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -333903976, now seen corresponding path program 13 times [2021-11-21 00:43:12,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943086515] [2021-11-21 00:43:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:12,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 00:43:14,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943086515] [2021-11-21 00:43:14,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943086515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:43:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113939622] [2021-11-21 00:43:14,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:43:14,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:14,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:14,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:14,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9c5746-0ba2-4e21-bb97-8503ab91043f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:43:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 00:43:14,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 00:43:15,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:15,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2021-11-21 00:43:15,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:15,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 100 [2021-11-21 00:43:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:15,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 120 [2021-11-21 00:43:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 140 [2021-11-21 00:43:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:16,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:16,345 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-11-21 00:43:16,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 191 treesize of output 130 [2021-11-21 00:43:17,258 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 00:43:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 181 treesize of output 61 [2021-11-21 00:43:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 00:43:17,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:43:40,829 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 178 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:44:16,942 WARN L227 SmtUtils]: Spent 15.99s on a formula simplification that was a NOOP. DAG size: 229 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:44:26,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:44:26,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 188116297 treesize of output 154750179