./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array27_pattern.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_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/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_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array27_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/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_bff26271-3866-40cc-bf04-e740bc986011/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 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:45:16,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:45:16,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:45:16,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:45:16,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:45:16,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:45:16,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:45:16,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:45:16,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:45:16,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:45:16,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:45:16,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:45:16,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:45:16,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:45:16,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:45:16,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:45:16,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:45:16,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:45:16,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:45:16,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:45:16,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:45:16,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:45:16,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:45:16,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:45:16,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:45:16,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:45:16,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:45:16,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:45:16,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:45:16,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:45:16,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:45:16,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:45:16,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:45:16,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:45:16,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:45:16,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:45:16,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:45:16,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:45:16,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:45:16,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:45:16,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:45:16,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:45:16,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:45:16,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:45:16,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:45:16,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:45:16,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:45:16,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:45:16,390 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:45:16,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:45:16,391 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:45:16,391 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:45:16,391 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:45:16,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:45:16,392 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:45:16,392 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:45:16,392 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:45:16,392 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:45:16,393 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:45:16,393 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:45:16,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:45:16,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:45:16,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:45:16,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:45:16,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:45:16,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:45:16,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:45:16,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:45:16,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:45:16,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:45:16,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:45:16,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:45:16,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:45:16,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:45:16,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:45:16,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:45:16,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:45:16,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:45:16,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:45:16,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:45:16,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:45:16,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:45:16,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:45:16,398 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_bff26271-3866-40cc-bf04-e740bc986011/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 [2021-11-20 23:45:16,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:45:16,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:45:16,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:45:16,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:45:16,734 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:45:16,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array27_pattern.c [2021-11-20 23:45:16,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/39d1d81a3/8855ab20e4e346b89d18357c97842a19/FLAG11c33d86b [2021-11-20 23:45:17,321 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:45:17,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/sv-benchmarks/c/array-patterns/array27_pattern.c [2021-11-20 23:45:17,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/39d1d81a3/8855ab20e4e346b89d18357c97842a19/FLAG11c33d86b [2021-11-20 23:45:17,647 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/39d1d81a3/8855ab20e4e346b89d18357c97842a19 [2021-11-20 23:45:17,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:45:17,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:45:17,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:45:17,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:45:17,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:45:17,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:17" (1/1) ... [2021-11-20 23:45:17,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d36dc9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:17, skipping insertion in model container [2021-11-20 23:45:17,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:17" (1/1) ... [2021-11-20 23:45:17,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:45:17,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:45:17,973 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_bff26271-3866-40cc-bf04-e740bc986011/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2021-11-20 23:45:18,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:45:18,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:45:18,037 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_bff26271-3866-40cc-bf04-e740bc986011/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2021-11-20 23:45:18,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:45:18,082 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:45:18,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18 WrapperNode [2021-11-20 23:45:18,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:45:18,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:45:18,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:45:18,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:45:18,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,132 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-11-20 23:45:18,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:45:18,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:45:18,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:45:18,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:45:18,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:45:18,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:45:18,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:45:18,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:45:18,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (1/1) ... [2021-11-20 23:45:18,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:45:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:18,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:45:18,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:45:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:45:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:45:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:45:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:45:18,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:45:18,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:45:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:45:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:45:18,350 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:45:18,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:45:18,487 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:45:18,543 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:45:18,543 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 23:45:18,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:18 BoogieIcfgContainer [2021-11-20 23:45:18,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:45:18,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:45:18,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:45:18,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:45:18,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:45:17" (1/3) ... [2021-11-20 23:45:18,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1a30aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:18, skipping insertion in model container [2021-11-20 23:45:18,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:18" (2/3) ... [2021-11-20 23:45:18,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1a30aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:18, skipping insertion in model container [2021-11-20 23:45:18,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:18" (3/3) ... [2021-11-20 23:45:18,555 INFO L111 eAbstractionObserver]: Analyzing ICFG array27_pattern.c [2021-11-20 23:45:18,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:45:18,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:45:18,615 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:45:18,624 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 [2021-11-20 23:45:18,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:45:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:45:18,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:18,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:45:18,646 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 111032306, now seen corresponding path program 1 times [2021-11-20 23:45:18,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:18,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729141264] [2021-11-20 23:45:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:18,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:18,747 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:45:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628320573] [2021-11-20 23:45:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:18,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:18,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:18,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:45:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:45:18,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:19,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:45:19,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:19,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729141264] [2021-11-20 23:45:19,049 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:45:19,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628320573] [2021-11-20 23:45:19,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628320573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:19,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:19,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:45:19,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959875114] [2021-11-20 23:45:19,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:19,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:45:19,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:45:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:19,089 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:19,137 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-11-20 23:45:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:45:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 23:45:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:19,162 INFO L225 Difference]: With dead ends: 19 [2021-11-20 23:45:19,162 INFO L226 Difference]: Without dead ends: 10 [2021-11-20 23:45:19,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:45:19,175 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:19,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:45:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-20 23:45:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-20 23:45:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2021-11-20 23:45:19,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2021-11-20 23:45:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:19,220 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-11-20 23:45:19,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2021-11-20 23:45:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:45:19,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:19,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:19,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 23:45:19,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 23:45:19,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1329661337, now seen corresponding path program 1 times [2021-11-20 23:45:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638252846] [2021-11-20 23:45:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:19,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:19,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:45:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254440074] [2021-11-20 23:45:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:19,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:19,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:19,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:45:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:45:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:19,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:45:19,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638252846] [2021-11-20 23:45:19,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:45:19,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254440074] [2021-11-20 23:45:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254440074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:19,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:45:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79949752] [2021-11-20 23:45:19,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:19,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:45:19,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:45:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:45:19,570 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:19,615 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-11-20 23:45:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:45:19,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:45:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:19,616 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:45:19,616 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 23:45:19,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:19,619 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:19,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:45:19,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 23:45:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-20 23:45:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-20 23:45:19,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2021-11-20 23:45:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:19,625 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-20 23:45:19,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-20 23:45:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:45:19,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:19,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:19,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:19,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:19,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1537908078, now seen corresponding path program 1 times [2021-11-20 23:45:19,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:19,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684323921] [2021-11-20 23:45:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:19,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:19,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:45:19,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314784572] [2021-11-20 23:45:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:19,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:19,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:19,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:19,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:45:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:45:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:45:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:45:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:45:20,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684323921] [2021-11-20 23:45:20,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:45:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314784572] [2021-11-20 23:45:20,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314784572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:45:20,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187562256] [2021-11-20 23:45:20,134 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:45:20,134 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:45:20,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:45:20,146 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:45:20,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:45:20,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:20,308 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:45:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:45:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:20,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-20 23:45:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:20,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-11-20 23:45:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 191 [2021-11-20 23:45:21,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:45:21,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:45:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2021-11-20 23:45:21,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:21,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,638 INFO L354 Elim1Store]: treesize reduction 308, result has 17.9 percent of original size [2021-11-20 23:45:21,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 357 treesize of output 453 [2021-11-20 23:45:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 37 [2021-11-20 23:45:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:21,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 37 [2021-11-20 23:45:22,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:22,064 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-20 23:45:22,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 37 [2021-11-20 23:45:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:22,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:22,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:22,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:45:22,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 301 treesize of output 235 [2021-11-20 23:45:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:23,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-11-20 23:45:24,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:24,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:24,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:24,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,253 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:45:25,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:45:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:45:25,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:25,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:45:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:25,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:25,648 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:45:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 145 [2021-11-20 23:45:25,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:25,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:45:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 95 [2021-11-20 23:45:26,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:26,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:26,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:26,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:26,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:26,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:26,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:26,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:27,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:27,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:27,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:27,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:27,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:27,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:27,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:27,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:27,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:27,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:27,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:27,718 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:45:27,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [187562256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:27,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:45:27,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2021-11-20 23:45:27,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442026106] [2021-11-20 23:45:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:27,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:45:27,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:45:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:45:27,894 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:27,981 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-20 23:45:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:45:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:45:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:27,983 INFO L225 Difference]: With dead ends: 19 [2021-11-20 23:45:27,983 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 23:45:27,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:45:27,985 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:27,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:45:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 23:45:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-20 23:45:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-20 23:45:27,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2021-11-20 23:45:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:27,995 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-20 23:45:27,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-20 23:45:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:45:27,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:27,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:28,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:28,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:28,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1643618289, now seen corresponding path program 1 times [2021-11-20 23:45:28,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:28,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544653515] [2021-11-20 23:45:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:28,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:28,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:45:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523160105] [2021-11-20 23:45:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:28,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:28,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:28,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:45:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:45:28,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:28,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:45:28,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:45:28,501 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 35 treesize of output 23 [2021-11-20 23:45:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:28,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:45:28,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:28,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 156 treesize of output 156 [2021-11-20 23:45:29,023 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 21 treesize of output 4 [2021-11-20 23:45:29,097 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 21 treesize of output 4 [2021-11-20 23:45:29,199 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 21 treesize of output 4 [2021-11-20 23:45:29,247 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 21 treesize of output 4 [2021-11-20 23:45:29,359 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 19 treesize of output 4 [2021-11-20 23:45:29,407 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 19 treesize of output 4 [2021-11-20 23:45:29,551 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 19 treesize of output 4 [2021-11-20 23:45:29,595 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 19 treesize of output 4 [2021-11-20 23:45:30,017 INFO L354 Elim1Store]: treesize reduction 140, result has 48.7 percent of original size [2021-11-20 23:45:30,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 140 treesize of output 204 [2021-11-20 23:45:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:45:35,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:35,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544653515] [2021-11-20 23:45:35,358 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:45:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523160105] [2021-11-20 23:45:35,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523160105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:45:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383307592] [2021-11-20 23:45:35,360 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:45:35,361 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:45:35,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:45:35,361 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:45:35,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:45:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:35,479 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-20 23:45:35,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-20 23:45:35,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:35,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:35,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 110 [2021-11-20 23:45:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:35,958 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:45:35,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:45:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:36,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 94 [2021-11-20 23:45:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 14 [2021-11-20 23:45:36,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:36,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:37,285 INFO L354 Elim1Store]: treesize reduction 290, result has 23.5 percent of original size [2021-11-20 23:45:37,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 358 treesize of output 441 [2021-11-20 23:45:38,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:38,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:38,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:38,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:45:38,514 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 196 [2021-11-20 23:45:39,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:39,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:39,246 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-11-20 23:45:39,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 287 treesize of output 247 [2021-11-20 23:45:39,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:39,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 28 [2021-11-20 23:45:40,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:40,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:45:40,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 283 treesize of output 238 [2021-11-20 23:45:40,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:40,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:41,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:41,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:41,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,631 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:45:41,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:45:41,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:41,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:45:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:45:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:41,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:41,967 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:45:41,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 145 [2021-11-20 23:45:42,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:42,122 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:45:42,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 95 [2021-11-20 23:45:42,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:42,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:42,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:42,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:45:42,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:42,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:42,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:42,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:42,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:42,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:42,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:44,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:44,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:45:44,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:44,647 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:44,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:44,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:44,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:44,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:44,800 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:45:45,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:45:45,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:45:45,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 23:45:45,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762033062] [2021-11-20 23:45:45,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:45:45,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 23:45:45,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:45,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 23:45:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:45:45,124 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:45,672 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-11-20 23:45:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:45:45,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 23:45:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:45,674 INFO L225 Difference]: With dead ends: 38 [2021-11-20 23:45:45,675 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 23:45:45,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:45:45,676 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:45,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 165 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2021-11-20 23:45:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 23:45:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 18. [2021-11-20 23:45:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-20 23:45:45,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-20 23:45:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:45,685 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-20 23:45:45,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-20 23:45:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:45:45,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:45,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:45,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:45,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash -595789752, now seen corresponding path program 2 times [2021-11-20 23:45:45,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:45,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868979421] [2021-11-20 23:45:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:45,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:45,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:45:45,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86129009] [2021-11-20 23:45:45,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:45:45,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:45,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:45,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:45:45,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:45:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:45:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:45:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:45:46,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:45:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:45:46,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:46,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868979421] [2021-11-20 23:45:46,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:45:46,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86129009] [2021-11-20 23:45:46,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86129009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:45:46,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723076451] [2021-11-20 23:45:46,065 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:45:46,065 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:45:46,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:45:46,066 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:45:46,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:45:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,137 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:45:46,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:45:46,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-20 23:45:46,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2021-11-20 23:45:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 191 [2021-11-20 23:45:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 23:45:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 23:45:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 17 [2021-11-20 23:45:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:46,991 INFO L354 Elim1Store]: treesize reduction 316, result has 17.5 percent of original size [2021-11-20 23:45:46,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 357 treesize of output 457 [2021-11-20 23:45:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:47,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:47,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 37 [2021-11-20 23:45:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:47,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 75 [2021-11-20 23:45:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:48,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:48,266 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-20 23:45:48,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 318 [2021-11-20 23:45:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:48,726 INFO L354 Elim1Store]: treesize reduction 52, result has 21.2 percent of original size [2021-11-20 23:45:48,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 264 [2021-11-20 23:45:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:49,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:49,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:49,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:50,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,185 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:45:50,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:45:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:45:50,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:50,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,558 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-20 23:45:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 106 [2021-11-20 23:45:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:50,735 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:45:50,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 95 [2021-11-20 23:45:51,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:51,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:51,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:51,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:45:51,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:51,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:51,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:51,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:51,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:51,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:52,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:52,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:52,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:52,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:52,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:52,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:52,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:52,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:53,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:53,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:53,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:53,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:53,176 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:45:53,429 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:45:53,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:45:53,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 23:45:53,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586093622] [2021-11-20 23:45:53,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:45:53,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:45:53,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:45:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:45:53,431 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:53,596 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-11-20 23:45:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:45:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 23:45:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:53,598 INFO L225 Difference]: With dead ends: 53 [2021-11-20 23:45:53,598 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 23:45:53,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:45:53,599 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:53,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:45:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 23:45:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2021-11-20 23:45:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2021-11-20 23:45:53,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 12 [2021-11-20 23:45:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:53,616 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2021-11-20 23:45:53,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:45:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2021-11-20 23:45:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:45:53,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:53,618 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:45:53,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:45:53,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:53,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash 724752490, now seen corresponding path program 3 times [2021-11-20 23:45:53,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:53,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012601102] [2021-11-20 23:45:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:53,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:53,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:45:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258552424] [2021-11-20 23:45:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:45:53,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:45:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:45:53,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:45:53,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:45:53,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:45:53,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:45:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:45:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:45:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:53,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:45:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:45:53,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012601102] [2021-11-20 23:45:53,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:45:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258552424] [2021-11-20 23:45:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258552424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:45:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221351569] [2021-11-20 23:45:53,999 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:45:53,999 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:45:53,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:45:53,999 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:45:53,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:45:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,091 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-20 23:45:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-20 23:45:54,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:54,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-11-20 23:45:54,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,336 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:45:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:45:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:54,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 90 [2021-11-20 23:45:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:54,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-11-20 23:45:54,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:54,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:54,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:54,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:55,152 INFO L354 Elim1Store]: treesize reduction 278, result has 23.4 percent of original size [2021-11-20 23:45:55,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 356 treesize of output 433 [2021-11-20 23:45:55,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:55,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:55,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:55,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:55,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:55,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:55,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:55,951 INFO L354 Elim1Store]: treesize reduction 65, result has 4.4 percent of original size [2021-11-20 23:45:55,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 306 treesize of output 256 [2021-11-20 23:45:56,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:45:56,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:45:56,231 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 223 treesize of output 166 [2021-11-20 23:45:56,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:56,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:56,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:56,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,290 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:45:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:45:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-11-20 23:45:57,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:57,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 18 [2021-11-20 23:45:57,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:45:57,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:45:57,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:45:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:45:57,668 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-20 23:45:57,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 95 [2021-11-20 23:45:58,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:58,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:58,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:58,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:58,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:58,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:45:58,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:58,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:59,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:45:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:45:59,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:00,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:00,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:00,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:00,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:00,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:00,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:00,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:00,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:00,269 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:00,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:00,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:00,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 23:46:00,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724531021] [2021-11-20 23:46:00,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:00,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:46:00,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:46:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:46:00,533 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:00,694 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2021-11-20 23:46:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:46:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 23:46:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:00,695 INFO L225 Difference]: With dead ends: 46 [2021-11-20 23:46:00,695 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 23:46:00,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:46:00,697 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:00,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 23:46:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-11-20 23:46:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-11-20 23:46:00,706 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 12 [2021-11-20 23:46:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:00,707 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-11-20 23:46:00,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-11-20 23:46:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:46:00,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:00,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:00,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 23:46:00,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:00,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1157329458, now seen corresponding path program 4 times [2021-11-20 23:46:00,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:00,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496027299] [2021-11-20 23:46:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:00,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:00,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:00,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342633942] [2021-11-20 23:46:00,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:46:00,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:00,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:00,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:00,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:46:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:46:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:01,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:46:01,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496027299] [2021-11-20 23:46:01,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:01,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342633942] [2021-11-20 23:46:01,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342633942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043073824] [2021-11-20 23:46:01,067 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:46:01,067 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:01,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:01,068 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:01,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,115 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:46:01,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:46:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-20 23:46:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-20 23:46:01,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:01,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 90 [2021-11-20 23:46:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:46:01,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:01,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:01,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:01,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:02,049 INFO L354 Elim1Store]: treesize reduction 278, result has 23.4 percent of original size [2021-11-20 23:46:02,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 356 treesize of output 433 [2021-11-20 23:46:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:02,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:46:02,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:02,678 INFO L354 Elim1Store]: treesize reduction 65, result has 4.4 percent of original size [2021-11-20 23:46:02,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 197 [2021-11-20 23:46:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:02,952 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:46:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 229 [2021-11-20 23:46:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:03,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 24 [2021-11-20 23:46:03,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:03,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:03,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:03,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:03,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,462 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:46:04,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:46:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:46:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,616 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-20 23:46:04,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:46:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:46:04,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 106 [2021-11-20 23:46:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:04,998 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:46:04,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 189 treesize of output 152 [2021-11-20 23:46:05,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:05,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:05,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:05,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:05,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:05,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:05,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:05,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:05,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:07,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:07,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:07,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:07,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:07,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:07,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:07,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:07,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:07,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:07,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:07,366 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:07,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:07,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:07,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 23:46:07,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395556433] [2021-11-20 23:46:07,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:07,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:46:07,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:07,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:46:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:07,589 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:07,753 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2021-11-20 23:46:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:46:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 23:46:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:07,754 INFO L225 Difference]: With dead ends: 59 [2021-11-20 23:46:07,755 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 23:46:07,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:46:07,756 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:07,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 23:46:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2021-11-20 23:46:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-11-20 23:46:07,772 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-11-20 23:46:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:07,772 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-11-20 23:46:07,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-11-20 23:46:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:46:07,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:07,774 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:07,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:07,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:07,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:07,992 INFO L85 PathProgramCache]: Analyzing trace with hash -541820470, now seen corresponding path program 5 times [2021-11-20 23:46:07,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:07,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80563902] [2021-11-20 23:46:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:07,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:07,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:07,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303501731] [2021-11-20 23:46:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:46:07,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:07,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:08,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:46:08,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 23:46:08,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:46:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:46:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 23:46:08,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 23:46:08,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:08,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80563902] [2021-11-20 23:46:08,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303501731] [2021-11-20 23:46:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303501731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149781911] [2021-11-20 23:46:08,179 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:46:08,179 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:08,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:08,179 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:08,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,269 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-20 23:46:08,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-20 23:46:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-20 23:46:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:46:08,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-11-20 23:46:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,531 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:46:08,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:46:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:08,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:08,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:08,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 191 [2021-11-20 23:46:08,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:09,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:46:09,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:46:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2021-11-20 23:46:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:09,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:09,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:09,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,525 INFO L354 Elim1Store]: treesize reduction 300, result has 18.3 percent of original size [2021-11-20 23:46:09,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 357 treesize of output 449 [2021-11-20 23:46:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:09,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 37 [2021-11-20 23:46:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:09,914 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 23:46:09,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 419 treesize of output 331 [2021-11-20 23:46:10,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:10,303 INFO L354 Elim1Store]: treesize reduction 50, result has 21.9 percent of original size [2021-11-20 23:46:10,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 316 treesize of output 263 [2021-11-20 23:46:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 43 [2021-11-20 23:46:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:11,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 46 [2021-11-20 23:46:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:11,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:11,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,059 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:46:12,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:46:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:46:12,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 18 [2021-11-20 23:46:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-11-20 23:46:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:46:12,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,338 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-20 23:46:12,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 187 treesize of output 153 [2021-11-20 23:46:12,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:12,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:46:12,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:46:13,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:13,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:13,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:13,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:46:13,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:13,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:13,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:13,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:13,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:13,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:14,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:14,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:46:14,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:14,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:14,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:14,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:14,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:14,933 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:15,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:15,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:15,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 23:46:15,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781629148] [2021-11-20 23:46:15,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:15,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:46:15,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:46:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:15,167 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:15,306 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-20 23:46:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:46:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 23:46:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:15,307 INFO L225 Difference]: With dead ends: 38 [2021-11-20 23:46:15,307 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 23:46:15,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:46:15,308 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:15,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 10 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 23:46:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-11-20 23:46:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-20 23:46:15,316 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2021-11-20 23:46:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:15,316 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-20 23:46:15,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-20 23:46:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:46:15,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:15,317 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 23:46:15,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:15,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:15,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1248500512, now seen corresponding path program 6 times [2021-11-20 23:46:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660585031] [2021-11-20 23:46:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:15,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:15,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:15,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623844733] [2021-11-20 23:46:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:46:15,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:15,561 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:15,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:46:15,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:46:15,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:46:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:46:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:46:15,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:46:15,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:15,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660585031] [2021-11-20 23:46:15,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:15,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623844733] [2021-11-20 23:46:15,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623844733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:15,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1468808137] [2021-11-20 23:46:15,714 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:46:15,714 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:15,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:15,714 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:15,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:15,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:15,781 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:46:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:46:15,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:15,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-20 23:46:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:15,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-20 23:46:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 191 [2021-11-20 23:46:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 23:46:16,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 23:46:16,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 17 [2021-11-20 23:46:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:16,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:16,948 INFO L354 Elim1Store]: treesize reduction 300, result has 18.3 percent of original size [2021-11-20 23:46:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 357 treesize of output 449 [2021-11-20 23:46:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 37 [2021-11-20 23:46:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,315 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-11-20 23:46:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 37 [2021-11-20 23:46:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,342 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 23:46:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 328 [2021-11-20 23:46:17,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:17,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,754 INFO L354 Elim1Store]: treesize reduction 61, result has 4.7 percent of original size [2021-11-20 23:46:17,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 231 treesize of output 179 [2021-11-20 23:46:18,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:18,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:18,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:18,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:19,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,384 INFO L354 Elim1Store]: treesize reduction 180, result has 13.9 percent of original size [2021-11-20 23:46:19,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 208 treesize of output 252 [2021-11-20 23:46:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-11-20 23:46:19,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,552 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:46:19,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 18 [2021-11-20 23:46:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:46:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 25 [2021-11-20 23:46:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:19,906 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-20 23:46:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 180 treesize of output 146 [2021-11-20 23:46:20,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:20,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:20,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:20,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:20,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:20,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:20,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:20,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:20,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:20,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:20,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:20,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:22,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:46:22,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:22,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:22,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:46:22,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:22,614 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:22,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 23:46:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124359771] [2021-11-20 23:46:22,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:22,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:46:22,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:46:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:22,616 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:22,759 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-20 23:46:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:46:22,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:46:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:22,760 INFO L225 Difference]: With dead ends: 29 [2021-11-20 23:46:22,760 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 23:46:22,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:46:22,761 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:22,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 23:46:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 23:46:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-20 23:46:22,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-11-20 23:46:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:22,769 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-20 23:46:22,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-20 23:46:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:46:22,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:22,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 23:46:22,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:22,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:22,985 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:22,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1293903980, now seen corresponding path program 7 times [2021-11-20 23:46:22,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:22,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107593051] [2021-11-20 23:46:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:22,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:22,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117983819] [2021-11-20 23:46:22,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:46:22,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:22,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:22,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:46:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 23:46:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:23,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 23:46:23,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:46:23,238 INFO L354 Elim1Store]: treesize reduction 150, result has 21.5 percent of original size [2021-11-20 23:46:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 97 [2021-11-20 23:46:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2021-11-20 23:46:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 27 [2021-11-20 23:46:23,484 INFO L354 Elim1Store]: treesize reduction 687, result has 19.4 percent of original size [2021-11-20 23:46:23,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 178 treesize of output 303 [2021-11-20 23:46:23,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:23,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:23,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 45 [2021-11-20 23:46:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 94 [2021-11-20 23:46:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 12 [2021-11-20 23:46:23,682 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 23:46:23,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 23:46:23,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:46:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:23,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 33 [2021-11-20 23:46:24,194 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-20 23:46:24,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 109 treesize of output 36 [2021-11-20 23:46:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:24,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:01,379 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:47:02,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:47:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1989 treesize of output 1989 [2021-11-20 23:47:03,814 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 19 treesize of output 4 [2021-11-20 23:47:04,740 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 19 treesize of output 4 [2021-11-20 23:47:09,121 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 19 treesize of output 4 [2021-11-20 23:47:10,021 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 19 treesize of output 4 [2021-11-20 23:47:12,989 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 21 treesize of output 4 [2021-11-20 23:47:13,374 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 21 treesize of output 4 [2021-11-20 23:47:15,350 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 21 treesize of output 4 [2021-11-20 23:47:19,450 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 21 treesize of output 4 [2021-11-20 23:47:21,475 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 1963 treesize of output 1899 [2021-11-20 23:50:39,540 WARN L227 SmtUtils]: Spent 3.29m on a formula simplification. DAG size of input: 215 DAG size of output: 155 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:50:39,543 INFO L354 Elim1Store]: treesize reduction 473, result has 55.1 percent of original size [2021-11-20 23:50:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 54419420 treesize of output 51855848 [2021-11-20 23:52:41,245 WARN L227 SmtUtils]: Spent 2.03m on a formula simplification that was a NOOP. DAG size: 8691 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:52:41,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107593051] [2021-11-20 23:52:41,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:52:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117983819] [2021-11-20 23:52:41,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 23:52:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882595701] [2021-11-20 23:52:41,506 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-20 23:52:41,506 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:52:41,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:52:41,507 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:52:41,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:52:41,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,577 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:52:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:52:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-20 23:52:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:41,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-20 23:52:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 191 [2021-11-20 23:52:42,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:52:42,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-20 23:52:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 17 [2021-11-20 23:52:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:42,947 INFO L354 Elim1Store]: treesize reduction 308, result has 17.9 percent of original size [2021-11-20 23:52:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 357 treesize of output 453 [2021-11-20 23:52:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:43,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 37 [2021-11-20 23:52:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 37 [2021-11-20 23:52:43,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:43,357 INFO L354 Elim1Store]: treesize reduction 65, result has 1.5 percent of original size [2021-11-20 23:52:43,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 387 treesize of output 322 [2021-11-20 23:52:44,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:44,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:44,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:44,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:44,147 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:52:44,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 251 treesize of output 179 [2021-11-20 23:52:45,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:45,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:45,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:45,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:52:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,856 INFO L354 Elim1Store]: treesize reduction 196, result has 12.9 percent of original size [2021-11-20 23:52:45,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 220 treesize of output 264 [2021-11-20 23:52:45,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:52:45,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:45,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:52:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 18 [2021-11-20 23:52:46,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:46,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-11-20 23:52:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:46,141 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:52:46,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 186 treesize of output 153 [2021-11-20 23:52:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:46,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:52:46,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-20 23:52:46,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:46,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:46,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:52:47,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:52:47,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:47,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:47,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:47,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:47,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:47,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:52:47,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:47,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:47,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:52:47,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:49,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:52:49,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:49,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:49,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 23:52:49,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 23:52:49,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:52:49,886 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:52:51,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:52:51,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:51,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 23:52:51,184 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-20 23:52:51,184 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 23:52:51,189 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:52:51,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:51,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:52:51,395 INFO L732 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2021-11-20 23:52:51,396 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:52:51,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:52:51 BoogieIcfgContainer [2021-11-20 23:52:51,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:52:51,414 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:52:51,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:52:51,414 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:52:51,415 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:18" (3/4) ... [2021-11-20 23:52:51,417 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:52:51,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:52:51,418 INFO L158 Benchmark]: Toolchain (without parser) took 453765.09ms. Allocated memory was 102.8MB in the beginning and 371.2MB in the end (delta: 268.4MB). Free memory was 65.3MB in the beginning and 147.5MB in the end (delta: -82.2MB). Peak memory consumption was 185.9MB. Max. memory is 16.1GB. [2021-11-20 23:52:51,418 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory is still 81.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:52:51,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.89ms. Allocated memory is still 102.8MB. Free memory was 65.1MB in the beginning and 79.2MB in the end (delta: -14.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:52:51,419 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.53ms. Allocated memory is still 102.8MB. Free memory was 79.2MB in the beginning and 77.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:52:51,419 INFO L158 Benchmark]: Boogie Preprocessor took 45.65ms. Allocated memory is still 102.8MB. Free memory was 77.5MB in the beginning and 76.3MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:52:51,420 INFO L158 Benchmark]: RCFGBuilder took 365.82ms. Allocated memory is still 102.8MB. Free memory was 76.3MB in the beginning and 63.8MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:52:51,420 INFO L158 Benchmark]: TraceAbstraction took 452865.81ms. Allocated memory was 102.8MB in the beginning and 371.2MB in the end (delta: 268.4MB). Free memory was 63.4MB in the beginning and 147.5MB in the end (delta: -84.1MB). Peak memory consumption was 184.2MB. Max. memory is 16.1GB. [2021-11-20 23:52:51,420 INFO L158 Benchmark]: Witness Printer took 3.87ms. Allocated memory is still 371.2MB. Free memory is still 147.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:52:51,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory is still 81.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.89ms. Allocated memory is still 102.8MB. Free memory was 65.1MB in the beginning and 79.2MB in the end (delta: -14.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.53ms. Allocated memory is still 102.8MB. Free memory was 79.2MB in the beginning and 77.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.65ms. Allocated memory is still 102.8MB. Free memory was 77.5MB in the beginning and 76.3MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 365.82ms. Allocated memory is still 102.8MB. Free memory was 76.3MB in the beginning and 63.8MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 452865.81ms. Allocated memory was 102.8MB in the beginning and 371.2MB in the end (delta: 268.4MB). Free memory was 63.4MB in the beginning and 147.5MB in the end (delta: -84.1MB). Peak memory consumption was 184.2MB. Max. memory is 16.1GB. * Witness Printer took 3.87ms. Allocated memory is still 371.2MB. Free memory is still 147.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 32]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L36] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L42] CALL assume_abort_if_not(ARR_SIZE > 0) [L30] COND TRUE !cond [L42] RET assume_abort_if_not(ARR_SIZE > 0) [L44] int array[ARR_SIZE][ARR_SIZE] ; [L46] int row = 0, column = 0 ; [L48] signed long long sum = 0 ; [L50] row=0 [L50] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/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 -> 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 [2021-11-20 23:52:54,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:52:54,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:52:54,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:52:54,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:52:54,544 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:52:54,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array27_pattern.c [2021-11-20 23:52:54,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/0d2631675/4479c8fffe06453abb3e3c7ca573e23b/FLAGa24d6fea4 [2021-11-20 23:52:55,170 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:52:55,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/sv-benchmarks/c/array-patterns/array27_pattern.c [2021-11-20 23:52:55,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/0d2631675/4479c8fffe06453abb3e3c7ca573e23b/FLAGa24d6fea4 [2021-11-20 23:52:55,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/data/0d2631675/4479c8fffe06453abb3e3c7ca573e23b [2021-11-20 23:52:55,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:52:55,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:52:55,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:52:55,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:52:55,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:52:55,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca4a453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55, skipping insertion in model container [2021-11-20 23:52:55,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:52:55,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:52:55,729 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_bff26271-3866-40cc-bf04-e740bc986011/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2021-11-20 23:52:55,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:52:55,757 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:52:55,774 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_bff26271-3866-40cc-bf04-e740bc986011/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2021-11-20 23:52:55,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:52:55,835 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:52:55,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55 WrapperNode [2021-11-20 23:52:55,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:52:55,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:52:55,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:52:55,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:52:55,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,893 INFO L137 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-11-20 23:52:55,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:52:55,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:52:55,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:52:55,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:52:55,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:52:55,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:52:55,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:52:55,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:52:55,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (1/1) ... [2021-11-20 23:52:55,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:52:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:55,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:52:56,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:52:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:52:56,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:52:56,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:52:56,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:52:56,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:52:56,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:52:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:52:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:52:56,131 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:52:56,133 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:52:56,760 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:52:56,766 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:52:56,766 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 23:52:56,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:56 BoogieIcfgContainer [2021-11-20 23:52:56,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:52:56,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:52:56,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:52:56,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:52:56,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:52:55" (1/3) ... [2021-11-20 23:52:56,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc31252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:56, skipping insertion in model container [2021-11-20 23:52:56,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:55" (2/3) ... [2021-11-20 23:52:56,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc31252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:56, skipping insertion in model container [2021-11-20 23:52:56,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:56" (3/3) ... [2021-11-20 23:52:56,793 INFO L111 eAbstractionObserver]: Analyzing ICFG array27_pattern.c [2021-11-20 23:52:56,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:52:56,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:52:56,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:52:56,907 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 [2021-11-20 23:52:56,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:52:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:52:56,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:56,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:56,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-11-20 23:52:56,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:52:56,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147349838] [2021-11-20 23:52:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:56,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:52:56,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:52:56,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:52:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:52:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 23:52:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:52:57,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:52:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:52:57,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:52:57,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147349838] [2021-11-20 23:52:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147349838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:57,245 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:57,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:52:57,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528760901] [2021-11-20 23:52:57,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:57,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:52:57,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:52:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:52:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:52:57,282 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:57,297 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-11-20 23:52:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:52:57,300 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:52:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:57,307 INFO L225 Difference]: With dead ends: 41 [2021-11-20 23:52:57,307 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 23:52:57,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:52:57,314 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:57,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:52:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 23:52:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-20 23:52:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-20 23:52:57,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-20 23:52:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:57,347 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-20 23:52:57,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-20 23:52:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:52:57,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:57,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:57,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:57,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:52:57,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-11-20 23:52:57,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:52:57,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216104446] [2021-11-20 23:52:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:57,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:52:57,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:52:57,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:52:57,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:52:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:52:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:52:58,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:52:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:52:58,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:52:58,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216104446] [2021-11-20 23:52:58,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216104446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:58,354 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:58,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 23:52:58,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289817677] [2021-11-20 23:52:58,355 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:58,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:52:58,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:52:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:52:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:52:58,361 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:58,767 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-20 23:52:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:52:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:52:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:58,783 INFO L225 Difference]: With dead ends: 28 [2021-11-20 23:52:58,783 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 23:52:58,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:52:58,785 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:58,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2021-11-20 23:52:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 23:52:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 23:52:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-20 23:52:58,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2021-11-20 23:52:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-20 23:52:58,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-20 23:52:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:52:58,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:58,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:58,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:59,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:52:59,008 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1411380456, now seen corresponding path program 1 times [2021-11-20 23:52:59,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:52:59,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241058649] [2021-11-20 23:52:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:59,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:52:59,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:52:59,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:52:59,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:52:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:52:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:52:59,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:52:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:52:59,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:52:59,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241058649] [2021-11-20 23:52:59,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241058649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:59,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:59,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 23:52:59,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730321853] [2021-11-20 23:52:59,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:59,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:52:59,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:52:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:52:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:52:59,687 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:52:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:59,997 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-20 23:52:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:52:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:52:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:59,999 INFO L225 Difference]: With dead ends: 34 [2021-11-20 23:53:00,000 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 23:53:00,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:53:00,001 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:00,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-11-20 23:53:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 23:53:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-20 23:53:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-20 23:53:00,007 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-11-20 23:53:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:00,016 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-20 23:53:00,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-20 23:53:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:53:00,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:00,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:00,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:00,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:53:00,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100115, now seen corresponding path program 1 times [2021-11-20 23:53:00,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:53:00,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122679688] [2021-11-20 23:53:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:00,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:53:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:53:00,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:53:00,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:53:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:53:00,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:00,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:53:01,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:53:01,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122679688] [2021-11-20 23:53:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122679688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [310403623] [2021-11-20 23:53:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:01,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:53:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:53:01,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:53:01,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-20 23:53:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:53:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:01,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:01,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [310403623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:01,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738866368] [2021-11-20 23:53:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:01,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:53:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:53:01,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:53:01,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:53:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:53:02,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:53:02,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:53:02,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738866368] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:53:02,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-20 23:53:02,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7, 8, 7, 5] total 18 [2021-11-20 23:53:02,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584272248] [2021-11-20 23:53:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:02,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:53:02,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:53:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:53:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:53:02,415 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:02,701 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-20 23:53:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:53:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 23:53:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:02,714 INFO L225 Difference]: With dead ends: 25 [2021-11-20 23:53:02,714 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 23:53:02,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:53:02,716 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:02,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 13 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:53:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 23:53:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-20 23:53:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-20 23:53:02,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-11-20 23:53:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:02,734 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-20 23:53:02,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-20 23:53:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:53:02,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:02,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:02,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:02,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 23:53:03,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:03,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:53:03,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:03,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1758364073, now seen corresponding path program 1 times [2021-11-20 23:53:03,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:53:03,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999609334] [2021-11-20 23:53:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:03,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:53:03,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:53:03,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:53:03,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:53:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:53:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:03,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:53:04,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:53:04,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999609334] [2021-11-20 23:53:04,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999609334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:04,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1570963425] [2021-11-20 23:53:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:04,289 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:53:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:53:04,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:53:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-20 23:53:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:04,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:53:04,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:04,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:04,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1570963425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391616998] [2021-11-20 23:53:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:04,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:53:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:53:04,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:53:05,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:53:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:53:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:53:05,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:53:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391616998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:05,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:53:05,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 6, 8] total 23 [2021-11-20 23:53:05,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865718227] [2021-11-20 23:53:05,824 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:53:05,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 23:53:05,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:53:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 23:53:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:53:05,826 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:07,965 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-11-20 23:53:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 23:53:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:53:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:07,968 INFO L225 Difference]: With dead ends: 78 [2021-11-20 23:53:07,968 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 23:53:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 23:53:07,970 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 64 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 152 Unchecked, 0.9s Time] [2021-11-20 23:53:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 23:53:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-11-20 23:53:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-11-20 23:53:07,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 19 [2021-11-20 23:53:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:07,983 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-11-20 23:53:07,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-11-20 23:53:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:53:07,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:07,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:07,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:08,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:08,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:08,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:53:08,590 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1705469543, now seen corresponding path program 1 times [2021-11-20 23:53:08,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:53:08,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381073746] [2021-11-20 23:53:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:08,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:53:08,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:53:08,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:53:08,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 23:53:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:53:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:09,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:53:09,664 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 16 treesize of output 8 [2021-11-20 23:53:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:10,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:29,606 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 37 treesize of output 35 [2021-11-20 23:53:29,616 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 72 treesize of output 70 [2021-11-20 23:54:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:00,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:54:00,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381073746] [2021-11-20 23:54:00,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381073746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:00,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119729598] [2021-11-20 23:54:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:00,755 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:54:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:54:00,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:54:00,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-20 23:54:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 23:54:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:54:07,392 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 16 treesize of output 8 [2021-11-20 23:54:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:07,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:13,028 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 37 treesize of output 35 [2021-11-20 23:54:13,037 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 72 treesize of output 70 [2021-11-20 23:54:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:30,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119729598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658374506] [2021-11-20 23:54:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:30,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:30,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:31,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:54:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:54:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:54:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:43,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:54:43,516 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 21 treesize of output 11 [2021-11-20 23:54:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:47,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:55:26,217 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 37 treesize of output 35 [2021-11-20 23:55:26,225 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 72 treesize of output 70 [2021-11-20 23:55:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:55:35,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658374506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:55:35,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:55:35,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 11, 12, 11] total 40 [2021-11-20 23:55:35,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075418554] [2021-11-20 23:55:35,655 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:55:35,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 23:55:35,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:55:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 23:55:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 23:55:35,658 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:56:27,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:56:36,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:57:11,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:57:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:19,044 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2021-11-20 23:57:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 23:57:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 23:57:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:19,045 INFO L225 Difference]: With dead ends: 99 [2021-11-20 23:57:19,046 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 23:57:19,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 191.6s TimeCoverageRelationStatistics Valid=613, Invalid=2927, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 23:57:19,050 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 80 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:19,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 91 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 258 Invalid, 3 Unknown, 55 Unchecked, 23.9s Time] [2021-11-20 23:57:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 23:57:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-11-20 23:57:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 70 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-11-20 23:57:19,066 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 21 [2021-11-20 23:57:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-11-20 23:57:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-11-20 23:57:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 23:57:19,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:19,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:19,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:19,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 23:57:19,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-20 23:57:19,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:19,672 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1309634075, now seen corresponding path program 1 times [2021-11-20 23:57:19,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:19,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323858936] [2021-11-20 23:57:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:19,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:19,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:19,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:57:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:19,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:57:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:19,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:19,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:19,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323858936] [2021-11-20 23:57:19,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323858936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:19,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:19,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 23:57:19,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562700356] [2021-11-20 23:57:19,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:57:20,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:57:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:20,000 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:20,256 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2021-11-20 23:57:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:57:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 23:57:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:20,261 INFO L225 Difference]: With dead ends: 109 [2021-11-20 23:57:20,262 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 23:57:20,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:57:20,263 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:20,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:57:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 23:57:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2021-11-20 23:57:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 70 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-20 23:57:20,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 21 [2021-11-20 23:57:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:20,290 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-20 23:57:20,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-20 23:57:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 23:57:20,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:20,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:20,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:20,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:20,492 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1881533531, now seen corresponding path program 2 times [2021-11-20 23:57:20,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:20,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892179472] [2021-11-20 23:57:20,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:57:20,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:20,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:20,495 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:20,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:57:20,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:57:20,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:57:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:57:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:21,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:21,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:21,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892179472] [2021-11-20 23:57:21,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892179472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:21,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1503560415] [2021-11-20 23:57:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:57:21,660 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:57:21,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:57:21,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-20 23:57:21,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:57:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:57:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:22,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:57:22,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1503560415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107592548] [2021-11-20 23:57:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:57:22,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:22,975 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:22,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 23:57:23,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:57:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:57:23,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:57:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:57:23,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:24,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107592548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:24,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:57:24,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 9, 7] total 33 [2021-11-20 23:57:24,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538083332] [2021-11-20 23:57:24,018 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:57:24,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 23:57:24,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 23:57:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 23:57:24,020 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:26,318 INFO L93 Difference]: Finished difference Result 157 states and 217 transitions. [2021-11-20 23:57:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 23:57:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 23:57:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:26,324 INFO L225 Difference]: With dead ends: 157 [2021-11-20 23:57:26,324 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 23:57:26,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 23:57:26,326 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:26,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 112 Invalid, 0 Unknown, 147 Unchecked, 0.8s Time] [2021-11-20 23:57:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 23:57:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-11-20 23:57:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 88 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2021-11-20 23:57:26,362 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 23 [2021-11-20 23:57:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:26,362 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2021-11-20 23:57:26,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:57:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2021-11-20 23:57:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:57:26,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:26,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:26,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:26,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-20 23:57:26,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 23:57:26,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:26,965 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1532144674, now seen corresponding path program 3 times [2021-11-20 23:57:26,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:26,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323916897] [2021-11-20 23:57:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:57:26,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:26,969 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:26,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 23:57:27,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:57:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:57:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:57:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:27,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:57:27,903 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-11-20 23:57:27,903 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 23 treesize of output 11 [2021-11-20 23:57:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:57:28,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:57,983 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 37 treesize of output 35 [2021-11-20 23:57:57,988 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 72 treesize of output 70 [2021-11-20 23:58:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:58:26,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:58:26,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323916897] [2021-11-20 23:58:26,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323916897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:26,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1158743051] [2021-11-20 23:58:26,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:58:26,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:58:26,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:58:26,340 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:58:26,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-20 23:58:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:58:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:58:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:58:26,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:58:32,210 INFO L354 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-11-20 23:58:32,211 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 23 treesize of output 11 [2021-11-20 23:58:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:58:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:40,362 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 37 treesize of output 35 [2021-11-20 23:58:40,368 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 72 treesize of output 70 [2021-11-20 23:59:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:59:01,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1158743051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:59:01,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090565059] [2021-11-20 23:59:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:59:01,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:59:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:01,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:59:01,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff26271-3866-40cc-bf04-e740bc986011/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 23:59:02,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:59:02,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:59:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:59:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates...