./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c24b72038b46d201b1011ce763d9f0fb09353d .......................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c24b72038b46d201b1011ce763d9f0fb09353d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 23:47:35,333 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 23:47:35,334 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 23:47:35,341 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 23:47:35,341 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 23:47:35,341 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 23:47:35,342 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 23:47:35,343 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 23:47:35,344 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 23:47:35,344 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 23:47:35,345 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 23:47:35,345 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 23:47:35,345 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 23:47:35,346 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 23:47:35,346 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 23:47:35,347 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 23:47:35,347 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 23:47:35,348 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 23:47:35,349 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 23:47:35,350 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 23:47:35,350 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 23:47:35,351 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 23:47:35,352 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 23:47:35,352 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 23:47:35,352 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 23:47:35,353 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 23:47:35,353 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 23:47:35,354 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 23:47:35,354 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 23:47:35,355 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 23:47:35,355 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 23:47:35,355 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 23:47:35,355 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 23:47:35,355 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 23:47:35,356 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 23:47:35,356 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 23:47:35,356 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 23:47:35,363 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 23:47:35,363 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 23:47:35,364 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 23:47:35,364 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 23:47:35,364 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 23:47:35,364 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 23:47:35,364 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 23:47:35,364 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 23:47:35,364 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 23:47:35,365 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 23:47:35,365 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 23:47:35,365 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 23:47:35,365 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 23:47:35,365 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 23:47:35,365 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 23:47:35,366 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 23:47:35,367 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 23:47:35,367 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 23:47:35,367 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 23:47:35,368 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 23:47:35,368 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 23:47:35,368 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 23:47:35,368 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 23:47:35,368 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan 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(__VERIFIER_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 -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-12-08 23:47:35,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 23:47:35,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 23:47:35,394 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 23:47:35,395 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 23:47:35,395 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 23:47:35,395 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-08 23:47:35,429 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/a16de9892/e5c2ca1d8c734b7aa558df4d57689abf/FLAGf6702ae65 [2018-12-08 23:47:35,884 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 23:47:35,885 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-08 23:47:35,891 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/a16de9892/e5c2ca1d8c734b7aa558df4d57689abf/FLAGf6702ae65 [2018-12-08 23:47:35,899 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/a16de9892/e5c2ca1d8c734b7aa558df4d57689abf [2018-12-08 23:47:35,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 23:47:35,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 23:47:35,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 23:47:35,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 23:47:35,904 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 23:47:35,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:47:35" (1/1) ... [2018-12-08 23:47:35,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dfd927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:35, skipping insertion in model container [2018-12-08 23:47:35,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:47:35" (1/1) ... [2018-12-08 23:47:35,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 23:47:35,928 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 23:47:36,082 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 23:47:36,120 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 23:47:36,155 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 23:47:36,187 INFO L195 MainTranslator]: Completed translation [2018-12-08 23:47:36,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36 WrapperNode [2018-12-08 23:47:36,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 23:47:36,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 23:47:36,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 23:47:36,188 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 23:47:36,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 23:47:36,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 23:47:36,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 23:47:36,219 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 23:47:36,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... [2018-12-08 23:47:36,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 23:47:36,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 23:47:36,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 23:47:36,238 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 23:47:36,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 23:47:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 23:47:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-08 23:47:36,273 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-08 23:47:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-08 23:47:36,273 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-08 23:47:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 23:47:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-08 23:47:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 23:47:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-08 23:47:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 23:47:36,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 23:47:36,275 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-08 23:47:36,439 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 23:47:36,439 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-08 23:47:36,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:47:36 BoogieIcfgContainer [2018-12-08 23:47:36,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 23:47:36,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 23:47:36,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 23:47:36,442 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 23:47:36,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 11:47:35" (1/3) ... [2018-12-08 23:47:36,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a537d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:47:36, skipping insertion in model container [2018-12-08 23:47:36,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:36" (2/3) ... [2018-12-08 23:47:36,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a537d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:47:36, skipping insertion in model container [2018-12-08 23:47:36,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:47:36" (3/3) ... [2018-12-08 23:47:36,444 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-12-08 23:47:36,463 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,464 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,464 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,464 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,464 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,464 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,464 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,465 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,466 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,467 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,467 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,467 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:36,472 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-08 23:47:36,472 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 23:47:36,478 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 23:47:36,487 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 23:47:36,502 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 23:47:36,502 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 23:47:36,502 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 23:47:36,502 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 23:47:36,502 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 23:47:36,503 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 23:47:36,503 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 23:47:36,503 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 23:47:36,509 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-08 23:47:36,548 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-08 23:47:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-08 23:47:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 23:47:36,557 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:36,558 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:36,560 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:36,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:36,564 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-08 23:47:36,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 23:47:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:36,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:36,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:36,606 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 23:47:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:36,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:36,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 23:47:36,717 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 23:47:36,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 23:47:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 23:47:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 23:47:36,731 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-08 23:47:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:36,791 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-08 23:47:36,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 23:47:36,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-08 23:47:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:36,801 INFO L225 Difference]: With dead ends: 1411 [2018-12-08 23:47:36,801 INFO L226 Difference]: Without dead ends: 322 [2018-12-08 23:47:36,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-08 23:47:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-08 23:47:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-08 23:47:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-08 23:47:36,836 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-08 23:47:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:36,836 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-08 23:47:36,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 23:47:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-08 23:47:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 23:47:36,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:36,837 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:36,837 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:36,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:36,837 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-08 23:47:36,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 23:47:36,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:36,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:36,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:36,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 23:47:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:36,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:36,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 23:47:36,883 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 23:47:36,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 23:47:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 23:47:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 23:47:36,884 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-08 23:47:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:36,907 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-08 23:47:36,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 23:47:36,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-08 23:47:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:36,908 INFO L225 Difference]: With dead ends: 411 [2018-12-08 23:47:36,908 INFO L226 Difference]: Without dead ends: 290 [2018-12-08 23:47:36,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-08 23:47:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-08 23:47:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-08 23:47:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-08 23:47:36,916 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-08 23:47:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:36,916 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-08 23:47:36,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 23:47:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-08 23:47:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 23:47:36,917 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:36,917 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:36,917 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:36,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-08 23:47:36,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 23:47:36,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:36,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:36,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:36,920 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 23:47:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:36,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:36,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 23:47:36,964 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 23:47:36,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 23:47:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 23:47:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:36,965 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-08 23:47:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:37,002 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-08 23:47:37,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 23:47:37,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 23:47:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:37,003 INFO L225 Difference]: With dead ends: 437 [2018-12-08 23:47:37,003 INFO L226 Difference]: Without dead ends: 309 [2018-12-08 23:47:37,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 23:47:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-08 23:47:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-08 23:47:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-08 23:47:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-08 23:47:37,011 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-08 23:47:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:37,011 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-08 23:47:37,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 23:47:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-08 23:47:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 23:47:37,012 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:37,012 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:37,012 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:37,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:37,013 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-08 23:47:37,013 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 23:47:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:37,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:37,015 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 23:47:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:37,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:37,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 23:47:37,056 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 23:47:37,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 23:47:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 23:47:37,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:37,057 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-08 23:47:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:37,094 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-08 23:47:37,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 23:47:37,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 23:47:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:37,096 INFO L225 Difference]: With dead ends: 456 [2018-12-08 23:47:37,096 INFO L226 Difference]: Without dead ends: 319 [2018-12-08 23:47:37,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 23:47:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-08 23:47:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-08 23:47:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-08 23:47:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-08 23:47:37,103 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-08 23:47:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:37,103 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-08 23:47:37,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 23:47:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-08 23:47:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 23:47:37,104 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:37,104 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:37,104 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:37,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-08 23:47:37,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 23:47:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:37,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 23:47:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 23:47:37,106 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 23:47:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:37,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:37,156 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 23:47:37,157 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:169) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:379) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) ... 20 more [2018-12-08 23:47:37,160 INFO L168 Benchmark]: Toolchain (without parser) took 1258.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.0 MB in the beginning and 962.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 117.4 MB. Max. memory is 11.5 GB. [2018-12-08 23:47:37,161 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 23:47:37,161 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. [2018-12-08 23:47:37,161 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 23:47:37,162 INFO L168 Benchmark]: Boogie Preprocessor took 19.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 23:47:37,162 INFO L168 Benchmark]: RCFGBuilder took 201.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2018-12-08 23:47:37,162 INFO L168 Benchmark]: TraceAbstraction took 718.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 962.8 MB in the end (delta: 122.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 11.5 GB. [2018-12-08 23:47:37,164 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 286.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 201.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 718.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 962.8 MB in the end (delta: 122.2 MB). Peak memory consumption was 122.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-08 23:47:38,558 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 23:47:38,560 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 23:47:38,569 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 23:47:38,569 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 23:47:38,569 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 23:47:38,570 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 23:47:38,571 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 23:47:38,572 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 23:47:38,572 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 23:47:38,572 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 23:47:38,573 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 23:47:38,573 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 23:47:38,573 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 23:47:38,574 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 23:47:38,574 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 23:47:38,575 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 23:47:38,576 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 23:47:38,577 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 23:47:38,577 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 23:47:38,578 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 23:47:38,579 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 23:47:38,580 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 23:47:38,580 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 23:47:38,580 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 23:47:38,581 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 23:47:38,581 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 23:47:38,582 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 23:47:38,582 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 23:47:38,582 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 23:47:38,583 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 23:47:38,583 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 23:47:38,583 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 23:47:38,583 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 23:47:38,584 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 23:47:38,584 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 23:47:38,584 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-08 23:47:38,591 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 23:47:38,591 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 23:47:38,592 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 23:47:38,592 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 23:47:38,592 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 23:47:38,592 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 23:47:38,592 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 23:47:38,592 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 23:47:38,592 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 23:47:38,592 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 23:47:38,593 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 23:47:38,593 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 23:47:38,594 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 23:47:38,594 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 23:47:38,594 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 23:47:38,595 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 23:47:38,595 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-08 23:47:38,595 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 23:47:38,595 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-08 23:47:38,595 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-08 23:47:38,595 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan 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(__VERIFIER_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 -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-12-08 23:47:38,613 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 23:47:38,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 23:47:38,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 23:47:38,627 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 23:47:38,627 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 23:47:38,628 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-08 23:47:38,673 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/7c4f5b04a/b7ac8f5b8b984a2bb55806b00acf16bc/FLAGffc364878 [2018-12-08 23:47:39,079 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 23:47:39,079 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-08 23:47:39,086 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/7c4f5b04a/b7ac8f5b8b984a2bb55806b00acf16bc/FLAGffc364878 [2018-12-08 23:47:39,094 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/data/7c4f5b04a/b7ac8f5b8b984a2bb55806b00acf16bc [2018-12-08 23:47:39,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 23:47:39,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 23:47:39,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 23:47:39,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 23:47:39,100 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 23:47:39,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4eb40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39, skipping insertion in model container [2018-12-08 23:47:39,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 23:47:39,126 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 23:47:39,297 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 23:47:39,305 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 23:47:39,332 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 23:47:39,405 INFO L195 MainTranslator]: Completed translation [2018-12-08 23:47:39,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39 WrapperNode [2018-12-08 23:47:39,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 23:47:39,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 23:47:39,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 23:47:39,406 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 23:47:39,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 23:47:39,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 23:47:39,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 23:47:39,434 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 23:47:39,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... [2018-12-08 23:47:39,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 23:47:39,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 23:47:39,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 23:47:39,451 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 23:47:39,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 23:47:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 23:47:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-08 23:47:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-08 23:47:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-08 23:47:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-08 23:47:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-08 23:47:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 23:47:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-08 23:47:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-08 23:47:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 23:47:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 23:47:39,486 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-08 23:47:39,646 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 23:47:39,646 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-08 23:47:39,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:47:39 BoogieIcfgContainer [2018-12-08 23:47:39,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 23:47:39,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 23:47:39,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 23:47:39,649 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 23:47:39,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 11:47:39" (1/3) ... [2018-12-08 23:47:39,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b513583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:47:39, skipping insertion in model container [2018-12-08 23:47:39,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 11:47:39" (2/3) ... [2018-12-08 23:47:39,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b513583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 11:47:39, skipping insertion in model container [2018-12-08 23:47:39,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:47:39" (3/3) ... [2018-12-08 23:47:39,651 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-12-08 23:47:39,668 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,668 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,669 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,670 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,671 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,672 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,672 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,672 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 23:47:39,677 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-08 23:47:39,677 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 23:47:39,682 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 23:47:39,691 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 23:47:39,706 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 23:47:39,706 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 23:47:39,706 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 23:47:39,706 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 23:47:39,707 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 23:47:39,707 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 23:47:39,707 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 23:47:39,707 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 23:47:39,707 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 23:47:39,713 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-08 23:47:39,754 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-08 23:47:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-08 23:47:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 23:47:39,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:39,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:39,766 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:39,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-08 23:47:39,772 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:39,773 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:39,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:39,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:39,885 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 23:47:39,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:39,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 23:47:39,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 23:47:39,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 23:47:39,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 23:47:39,900 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-08 23:47:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:39,991 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2018-12-08 23:47:39,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 23:47:39,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-08 23:47:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:40,003 INFO L225 Difference]: With dead ends: 1777 [2018-12-08 23:47:40,003 INFO L226 Difference]: Without dead ends: 499 [2018-12-08 23:47:40,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-08 23:47:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-12-08 23:47:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2018-12-08 23:47:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-12-08 23:47:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2018-12-08 23:47:40,041 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2018-12-08 23:47:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:40,041 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2018-12-08 23:47:40,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 23:47:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2018-12-08 23:47:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 23:47:40,042 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:40,042 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:40,042 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:40,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-08 23:47:40,043 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:40,043 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:40,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:40,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,115 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 23:47:40,116 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:40,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 23:47:40,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 23:47:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 23:47:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 23:47:40,118 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2018-12-08 23:47:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:40,163 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2018-12-08 23:47:40,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 23:47:40,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-08 23:47:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:40,165 INFO L225 Difference]: With dead ends: 464 [2018-12-08 23:47:40,165 INFO L226 Difference]: Without dead ends: 343 [2018-12-08 23:47:40,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-08 23:47:40,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2018-12-08 23:47:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-08 23:47:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2018-12-08 23:47:40,174 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2018-12-08 23:47:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:40,175 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2018-12-08 23:47:40,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 23:47:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2018-12-08 23:47:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 23:47:40,175 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:40,175 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:40,175 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:40,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash 676041288, now seen corresponding path program 1 times [2018-12-08 23:47:40,176 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:40,176 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:40,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:40,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,243 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 23:47:40,244 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:40,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 23:47:40,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 23:47:40,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 23:47:40,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 23:47:40,245 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2018-12-08 23:47:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:40,281 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2018-12-08 23:47:40,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 23:47:40,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-08 23:47:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:40,283 INFO L225 Difference]: With dead ends: 420 [2018-12-08 23:47:40,283 INFO L226 Difference]: Without dead ends: 290 [2018-12-08 23:47:40,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-08 23:47:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-08 23:47:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-08 23:47:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-08 23:47:40,289 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-08 23:47:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:40,289 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-08 23:47:40,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 23:47:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-08 23:47:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 23:47:40,290 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:40,290 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:40,290 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:40,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:40,290 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-08 23:47:40,291 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:40,291 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:40,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:40,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,397 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 23:47:40,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:40,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 23:47:40,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 23:47:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 23:47:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:40,399 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-08 23:47:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:40,465 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-08 23:47:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 23:47:40,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 23:47:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:40,467 INFO L225 Difference]: With dead ends: 437 [2018-12-08 23:47:40,467 INFO L226 Difference]: Without dead ends: 309 [2018-12-08 23:47:40,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-08 23:47:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-08 23:47:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-08 23:47:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-08 23:47:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-08 23:47:40,473 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-08 23:47:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:40,473 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-08 23:47:40,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 23:47:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-08 23:47:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 23:47:40,474 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:40,474 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:40,474 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:40,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-08 23:47:40,475 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:40,475 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:40,499 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-08 23:47:40,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-08 23:47:40,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:40,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,566 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-08 23:47:40,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 23:47:40,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 23:47:40,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 23:47:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 23:47:40,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 23:47:40,568 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-08 23:47:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:40,624 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-08 23:47:40,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 23:47:40,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 23:47:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:40,626 INFO L225 Difference]: With dead ends: 456 [2018-12-08 23:47:40,626 INFO L226 Difference]: Without dead ends: 319 [2018-12-08 23:47:40,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-08 23:47:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-08 23:47:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-08 23:47:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-08 23:47:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-08 23:47:40,632 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-08 23:47:40,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:40,632 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-08 23:47:40,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 23:47:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-08 23:47:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 23:47:40,633 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:40,633 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:40,633 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:40,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-08 23:47:40,633 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:40,633 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:40,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 23:47:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:40,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:40,826 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:47:40,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:40,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:40,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:47:40,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-08 23:47:40,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 23:47:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 23:47:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-08 23:47:40,892 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 11 states. [2018-12-08 23:47:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:41,296 INFO L93 Difference]: Finished difference Result 760 states and 1850 transitions. [2018-12-08 23:47:41,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 23:47:41,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-08 23:47:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:41,297 INFO L225 Difference]: With dead ends: 760 [2018-12-08 23:47:41,297 INFO L226 Difference]: Without dead ends: 383 [2018-12-08 23:47:41,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2018-12-08 23:47:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-08 23:47:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 351. [2018-12-08 23:47:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-08 23:47:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-08 23:47:41,303 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-08 23:47:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:41,304 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-08 23:47:41,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 23:47:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-08 23:47:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 23:47:41,305 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:41,305 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:41,305 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:41,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-08 23:47:41,306 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:41,306 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:41,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:41,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:41,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:41,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:41,490 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:47:41,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:41,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:41,523 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:41,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:47:41,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-08 23:47:41,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 23:47:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 23:47:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-08 23:47:41,544 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 11 states. [2018-12-08 23:47:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:41,992 INFO L93 Difference]: Finished difference Result 824 states and 1978 transitions. [2018-12-08 23:47:41,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 23:47:41,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-08 23:47:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:41,995 INFO L225 Difference]: With dead ends: 824 [2018-12-08 23:47:41,995 INFO L226 Difference]: Without dead ends: 447 [2018-12-08 23:47:41,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2018-12-08 23:47:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-08 23:47:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-08 23:47:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-08 23:47:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-08 23:47:42,001 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 29 [2018-12-08 23:47:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:42,001 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-08 23:47:42,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 23:47:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-08 23:47:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 23:47:42,002 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:42,002 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:42,003 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:42,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:42,003 INFO L82 PathProgramCache]: Analyzing trace with hash -956668217, now seen corresponding path program 1 times [2018-12-08 23:47:42,003 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:42,003 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:42,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:42,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:42,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:42,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:42,445 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:47:42,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:47:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:47:42,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:42,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:42,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:47:42,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-08 23:47:42,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 23:47:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 23:47:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-08 23:47:42,509 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 17 states. [2018-12-08 23:47:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:43,839 INFO L93 Difference]: Finished difference Result 1302 states and 3081 transitions. [2018-12-08 23:47:43,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-08 23:47:43,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-12-08 23:47:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:43,843 INFO L225 Difference]: With dead ends: 1302 [2018-12-08 23:47:43,843 INFO L226 Difference]: Without dead ends: 643 [2018-12-08 23:47:43,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 23:47:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-12-08 23:47:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 447. [2018-12-08 23:47:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-08 23:47:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-08 23:47:43,852 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 45 [2018-12-08 23:47:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:43,852 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-08 23:47:43,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 23:47:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-08 23:47:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-08 23:47:43,853 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:43,853 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:43,853 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:43,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:43,854 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 2 times [2018-12-08 23:47:43,854 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:43,854 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:43,879 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-08 23:47:43,958 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 23:47:43,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:43,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:44,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:44,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:44,664 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:47:44,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 23:47:44,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 23:47:44,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:44,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:44,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:44,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:47:44,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 25 [2018-12-08 23:47:44,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-08 23:47:44,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-08 23:47:44,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2018-12-08 23:47:44,747 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 25 states. [2018-12-08 23:47:46,862 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-08 23:47:47,083 WARN L180 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-08 23:47:47,310 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-08 23:47:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:48,638 INFO L93 Difference]: Finished difference Result 1718 states and 4109 transitions. [2018-12-08 23:47:48,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-08 23:47:48,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-12-08 23:47:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:48,640 INFO L225 Difference]: With dead ends: 1718 [2018-12-08 23:47:48,640 INFO L226 Difference]: Without dead ends: 767 [2018-12-08 23:47:48,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=758, Invalid=2434, Unknown=0, NotChecked=0, Total=3192 [2018-12-08 23:47:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-12-08 23:47:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-12-08 23:47:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-12-08 23:47:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-12-08 23:47:48,651 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 57 [2018-12-08 23:47:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:48,651 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-12-08 23:47:48,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-08 23:47:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-12-08 23:47:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-08 23:47:48,652 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:48,652 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:48,653 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:48,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 3 times [2018-12-08 23:47:48,653 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:48,653 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:48,669 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-08 23:47:48,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-08 23:47:48,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:48,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:48,922 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:49,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:49,740 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:47:49,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 23:47:49,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-08 23:47:49,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:49,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:49,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:47:49,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:47:49,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17] total 31 [2018-12-08 23:47:49,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-08 23:47:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-08 23:47:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2018-12-08 23:47:49,841 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 31 states. [2018-12-08 23:47:50,512 WARN L180 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-08 23:47:50,847 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-08 23:47:51,150 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-08 23:47:51,464 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-08 23:47:51,763 WARN L180 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-12-08 23:47:52,387 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-12-08 23:47:52,994 WARN L180 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-12-08 23:47:53,587 WARN L180 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-08 23:47:54,147 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-08 23:47:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:47:56,609 INFO L93 Difference]: Finished difference Result 2360 states and 5540 transitions. [2018-12-08 23:47:56,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-08 23:47:56,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-12-08 23:47:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:47:56,612 INFO L225 Difference]: With dead ends: 2360 [2018-12-08 23:47:56,612 INFO L226 Difference]: Without dead ends: 1139 [2018-12-08 23:47:56,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1140, Invalid=3830, Unknown=0, NotChecked=0, Total=4970 [2018-12-08 23:47:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2018-12-08 23:47:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 671. [2018-12-08 23:47:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-12-08 23:47:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-12-08 23:47:56,620 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-12-08 23:47:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:47:56,620 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-12-08 23:47:56,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-08 23:47:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-12-08 23:47:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-08 23:47:56,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:47:56,621 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:47:56,621 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:47:56,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:47:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash 831344650, now seen corresponding path program 4 times [2018-12-08 23:47:56,622 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:47:56,622 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:47:56,636 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 23:47:56,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 23:47:56,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:56,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:57,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:59,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:47:59,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:47:59,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 23:47:59,272 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 23:47:59,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:47:59,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:47:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:59,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:47:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:47:59,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:47:59,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27] total 51 [2018-12-08 23:47:59,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-08 23:47:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-08 23:47:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2018-12-08 23:47:59,331 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 51 states. [2018-12-08 23:47:59,783 WARN L180 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2018-12-08 23:48:00,135 WARN L180 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 14 [2018-12-08 23:48:01,012 WARN L180 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 18 [2018-12-08 23:48:01,759 WARN L180 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 16 [2018-12-08 23:48:02,577 WARN L180 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 16 [2018-12-08 23:48:03,351 WARN L180 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 16 [2018-12-08 23:48:04,106 WARN L180 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 16 [2018-12-08 23:48:04,850 WARN L180 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-12-08 23:48:05,566 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-08 23:48:06,263 WARN L180 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-08 23:48:06,966 WARN L180 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-08 23:48:07,665 WARN L180 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-08 23:48:08,310 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-08 23:48:08,940 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-08 23:48:09,490 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-08 23:48:13,466 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 21 [2018-12-08 23:48:14,061 WARN L180 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 21 [2018-12-08 23:48:14,643 WARN L180 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 21 [2018-12-08 23:48:15,220 WARN L180 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-12-08 23:48:15,738 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-12-08 23:48:16,268 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-12-08 23:48:16,732 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-08 23:48:17,167 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-08 23:48:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:48:19,501 INFO L93 Difference]: Finished difference Result 3134 states and 7235 transitions. [2018-12-08 23:48:19,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-08 23:48:19,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 113 [2018-12-08 23:48:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:48:19,505 INFO L225 Difference]: With dead ends: 3134 [2018-12-08 23:48:19,505 INFO L226 Difference]: Without dead ends: 1679 [2018-12-08 23:48:19,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=2576, Invalid=10306, Unknown=0, NotChecked=0, Total=12882 [2018-12-08 23:48:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2018-12-08 23:48:19,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1295. [2018-12-08 23:48:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-12-08 23:48:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2724 transitions. [2018-12-08 23:48:19,521 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2724 transitions. Word has length 113 [2018-12-08 23:48:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:48:19,522 INFO L480 AbstractCegarLoop]: Abstraction has 1295 states and 2724 transitions. [2018-12-08 23:48:19,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-08 23:48:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2724 transitions. [2018-12-08 23:48:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-08 23:48:19,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:48:19,524 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:48:19,524 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:48:19,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:48:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash 739295879, now seen corresponding path program 5 times [2018-12-08 23:48:19,525 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:48:19,525 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:48:19,547 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-08 23:48:19,732 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-12-08 23:48:19,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:48:19,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:48:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:48:20,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:48:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:48:22,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:48:22,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:48:22,711 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 23:48:22,816 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-12-08 23:48:22,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:48:22,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:48:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:48:22,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:48:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 23:48:22,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:48:22,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 30] total 57 [2018-12-08 23:48:22,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-12-08 23:48:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-12-08 23:48:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2018-12-08 23:48:22,920 INFO L87 Difference]: Start difference. First operand 1295 states and 2724 transitions. Second operand 57 states. [2018-12-08 23:48:24,644 WARN L180 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-08 23:48:25,313 WARN L180 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-08 23:48:25,984 WARN L180 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-08 23:48:26,640 WARN L180 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-08 23:48:27,256 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-08 23:48:27,893 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 21 [2018-12-08 23:48:28,572 WARN L180 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 21 [2018-12-08 23:48:29,175 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-08 23:48:29,804 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 21 [2018-12-08 23:48:30,370 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-08 23:48:30,992 WARN L180 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-12-08 23:48:32,068 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-12-08 23:48:33,100 WARN L180 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-12-08 23:48:34,063 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-08 23:48:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:48:38,654 INFO L93 Difference]: Finished difference Result 3230 states and 7427 transitions. [2018-12-08 23:48:38,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-08 23:48:38,654 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 125 [2018-12-08 23:48:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:48:38,657 INFO L225 Difference]: With dead ends: 3230 [2018-12-08 23:48:38,657 INFO L226 Difference]: Without dead ends: 1775 [2018-12-08 23:48:38,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=2465, Invalid=10875, Unknown=0, NotChecked=0, Total=13340 [2018-12-08 23:48:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2018-12-08 23:48:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 927. [2018-12-08 23:48:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-12-08 23:48:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1988 transitions. [2018-12-08 23:48:38,667 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1988 transitions. Word has length 125 [2018-12-08 23:48:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:48:38,667 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 1988 transitions. [2018-12-08 23:48:38,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-12-08 23:48:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1988 transitions. [2018-12-08 23:48:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-08 23:48:38,668 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:48:38,668 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:48:38,668 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:48:38,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:48:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 326351498, now seen corresponding path program 6 times [2018-12-08 23:48:38,669 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:48:38,669 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:48:38,685 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-12-08 23:48:39,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-08 23:48:39,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:48:39,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:48:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:48:39,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:48:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:48:45,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:48:45,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:48:45,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 23:48:45,668 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-08 23:48:45,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 23:48:45,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:48:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:48:45,694 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:48:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:48:45,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:48:45,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44, 44] total 85 [2018-12-08 23:48:45,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-12-08 23:48:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-12-08 23:48:45,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=6550, Unknown=0, NotChecked=0, Total=7140 [2018-12-08 23:48:45,778 INFO L87 Difference]: Start difference. First operand 927 states and 1988 transitions. Second operand 85 states. [2018-12-08 23:48:46,916 WARN L180 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 9 [2018-12-08 23:48:47,775 WARN L180 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 12 [2018-12-08 23:48:50,011 WARN L180 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 16 [2018-12-08 23:48:52,209 WARN L180 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 16 [2018-12-08 23:48:54,498 WARN L180 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 16 [2018-12-08 23:48:56,842 WARN L180 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 16 [2018-12-08 23:48:59,023 WARN L180 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 16 [2018-12-08 23:49:01,335 WARN L180 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 16 [2018-12-08 23:49:03,697 WARN L180 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 16 [2018-12-08 23:49:05,957 WARN L180 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 16 [2018-12-08 23:49:08,171 WARN L180 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 16 [2018-12-08 23:49:10,546 WARN L180 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 16 [2018-12-08 23:49:12,733 WARN L180 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 16 [2018-12-08 23:49:14,910 WARN L180 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 16 [2018-12-08 23:49:16,919 WARN L180 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 16 [2018-12-08 23:49:18,971 WARN L180 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 16 [2018-12-08 23:49:20,993 WARN L180 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 16 [2018-12-08 23:49:22,985 WARN L180 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 16 [2018-12-08 23:49:25,045 WARN L180 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 16 [2018-12-08 23:49:27,083 WARN L180 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 16 [2018-12-08 23:49:28,876 WARN L180 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 16 [2018-12-08 23:49:30,726 WARN L180 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 16 [2018-12-08 23:49:32,457 WARN L180 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 16 [2018-12-08 23:49:34,183 WARN L180 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 16 [2018-12-08 23:49:35,805 WARN L180 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-12-08 23:49:37,351 WARN L180 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-08 23:49:38,852 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-08 23:49:40,275 WARN L180 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-08 23:49:41,539 WARN L180 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-08 23:49:42,846 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-08 23:49:44,011 WARN L180 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-08 23:49:45,098 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-08 23:49:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:49:51,657 INFO L93 Difference]: Finished difference Result 1698 states and 3579 transitions. [2018-12-08 23:49:51,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-08 23:49:51,658 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 177 [2018-12-08 23:49:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:49:51,661 INFO L225 Difference]: With dead ends: 1698 [2018-12-08 23:49:51,661 INFO L226 Difference]: Without dead ends: 1567 [2018-12-08 23:49:51,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4879 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=4180, Invalid=23210, Unknown=0, NotChecked=0, Total=27390 [2018-12-08 23:49:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2018-12-08 23:49:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1567. [2018-12-08 23:49:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2018-12-08 23:49:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 3268 transitions. [2018-12-08 23:49:51,683 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 3268 transitions. Word has length 177 [2018-12-08 23:49:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:49:51,683 INFO L480 AbstractCegarLoop]: Abstraction has 1567 states and 3268 transitions. [2018-12-08 23:49:51,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-12-08 23:49:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 3268 transitions. [2018-12-08 23:49:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-12-08 23:49:51,687 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 23:49:51,687 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 23:49:51,687 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 23:49:51,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 23:49:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash 301327693, now seen corresponding path program 7 times [2018-12-08 23:49:51,688 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-08 23:49:51,688 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-08 23:49:51,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 23:49:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:49:51,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:49:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:49:52,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:49:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:49:57,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 23:49:57,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 23:49:57,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 23:49:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 23:49:57,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 23:49:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:49:57,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 23:49:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 23:49:57,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-08 23:49:57,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43] total 84 [2018-12-08 23:49:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-08 23:49:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-08 23:49:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6366, Unknown=0, NotChecked=0, Total=6972 [2018-12-08 23:49:57,746 INFO L87 Difference]: Start difference. First operand 1567 states and 3268 transitions. Second operand 84 states. [2018-12-08 23:50:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 23:50:02,275 INFO L93 Difference]: Finished difference Result 13655 states and 26972 transitions. [2018-12-08 23:50:02,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-08 23:50:02,276 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 181 [2018-12-08 23:50:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 23:50:02,276 INFO L225 Difference]: With dead ends: 13655 [2018-12-08 23:50:02,276 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 23:50:02,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1626, Invalid=13626, Unknown=0, NotChecked=0, Total=15252 [2018-12-08 23:50:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 23:50:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 23:50:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 23:50:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 23:50:02,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2018-12-08 23:50:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 23:50:02,277 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 23:50:02,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-08 23:50:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 23:50:02,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 23:50:02,280 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-08 23:50:02,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 11:50:02 BasicIcfg [2018-12-08 23:50:02,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 23:50:02,281 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 23:50:02,281 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 23:50:02,281 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 23:50:02,282 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 11:47:39" (3/4) ... [2018-12-08 23:50:02,284 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 23:50:02,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-12-08 23:50:02,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-12-08 23:50:02,290 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-12-08 23:50:02,290 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-08 23:50:02,290 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 23:50:02,312 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e1c05249-0719-4ba0-ae84-70baf78b18b5/bin-2019/utaipan/witness.graphml [2018-12-08 23:50:02,312 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 23:50:02,313 INFO L168 Benchmark]: Toolchain (without parser) took 143216.68 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 252.2 MB). Free memory was 939.3 MB in the beginning and 871.8 MB in the end (delta: 67.5 MB). Peak memory consumption was 319.7 MB. Max. memory is 11.5 GB. [2018-12-08 23:50:02,313 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 23:50:02,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -188.7 MB). Peak memory consumption was 44.1 MB. Max. memory is 11.5 GB. [2018-12-08 23:50:02,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-08 23:50:02,314 INFO L168 Benchmark]: Boogie Preprocessor took 16.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 23:50:02,314 INFO L168 Benchmark]: RCFGBuilder took 195.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-12-08 23:50:02,315 INFO L168 Benchmark]: TraceAbstraction took 142634.06 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 110.6 MB). Free memory was 1.1 GB in the beginning and 881.5 MB in the end (delta: 215.1 MB). Peak memory consumption was 325.7 MB. Max. memory is 11.5 GB. [2018-12-08 23:50:02,315 INFO L168 Benchmark]: Witness Printer took 31.24 ms. Allocated memory is still 1.3 GB. Free memory was 880.7 MB in the beginning and 871.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. [2018-12-08 23:50:02,317 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 308.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -188.7 MB). Peak memory consumption was 44.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 195.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 142634.06 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 110.6 MB). Free memory was 1.1 GB in the beginning and 881.5 MB in the end (delta: 215.1 MB). Peak memory consumption was 325.7 MB. Max. memory is 11.5 GB. * Witness Printer took 31.24 ms. Allocated memory is still 1.3 GB. Free memory was 880.7 MB in the beginning and 871.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 142.5s OverallTime, 14 OverallIterations, 21 TraceHistogramMax, 119.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1851 SDtfs, 18722 SDslu, 46714 SDs, 0 SdLazy, 10991 SolverSat, 2691 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3775 GetRequests, 3038 SyntacticMatches, 3 SemanticMatches, 734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12474 ImplicationChecksByTransitivity, 128.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1567occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 2074 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 20.2s InterpolantComputationTime, 1763 NumberOfCodeBlocks, 1763 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 3372 ConstructedInterpolants, 0 QuantifiedInterpolants, 2784124 SizeOfPredicates, 400 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 423 ConjunctsInUnsatCore, 41 InterpolantComputations, 5 PerfectInterpolantSequences, 48/16584 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...