./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 a5bec83c84f47b7653d49cdbe6bc7857a2bc0080 --rcfgbuilder.size.of.a.code.block SingleStatement .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:40:20,396 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:40:20,398 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:40:20,413 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:40:20,413 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:40:20,414 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:40:20,415 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:40:20,424 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:40:20,427 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:40:20,427 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:40:20,428 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:40:20,429 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:40:20,430 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:40:20,431 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:40:20,432 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:40:20,433 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:40:20,434 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:40:20,436 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:40:20,438 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:40:20,440 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:40:20,441 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:40:20,442 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:40:20,445 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:40:20,445 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:40:20,446 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:40:20,447 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:40:20,448 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:40:20,449 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:40:20,450 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:40:20,451 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:40:20,451 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:40:20,452 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:40:20,453 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:40:20,453 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:40:20,454 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:40:20,454 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:40:20,455 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:40:20,482 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:40:20,485 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:40:20,487 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:40:20,487 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:40:20,487 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:40:20,487 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:40:20,487 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:40:20,488 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:40:20,488 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:40:20,488 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:40:20,488 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:40:20,490 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:40:20,491 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:40:20,492 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:40:20,492 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:40:20,492 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:40:20,492 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:40:20,492 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:40:20,493 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:40:20,493 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:40:20,493 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:40:20,493 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:40:20,493 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:40:20,493 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:40:20,494 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:40:20,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:40:20,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:40:20,497 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:40:20,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:40:20,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:40:20,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:40:20,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:40:20,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:40:20,498 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:40:20,498 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> a5bec83c84f47b7653d49cdbe6bc7857a2bc0080 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:40:20,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:40:20,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:40:20,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:40:20,582 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:40:20,582 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:40:20,583 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i [2018-10-22 09:40:20,644 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0bd338b5d/d6e8a2c05a0743eb8ad9f3653d163897/FLAG85860c333 [2018-10-22 09:40:21,116 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:40:21,117 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03_false-unreach-call_true-termination.i [2018-10-22 09:40:21,125 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0bd338b5d/d6e8a2c05a0743eb8ad9f3653d163897/FLAG85860c333 [2018-10-22 09:40:21,141 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0bd338b5d/d6e8a2c05a0743eb8ad9f3653d163897 [2018-10-22 09:40:21,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:40:21,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:40:21,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:21,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:40:21,153 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:40:21,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb422f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21, skipping insertion in model container [2018-10-22 09:40:21,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:40:21,192 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:40:21,421 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:21,425 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:40:21,444 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:21,460 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:40:21,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21 WrapperNode [2018-10-22 09:40:21,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:21,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:21,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:40:21,462 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:40:21,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:21,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:40:21,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:40:21,487 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:40:21,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... [2018-10-22 09:40:21,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:40:21,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:40:21,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:40:21,513 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:40:21,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:40:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:40:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:40:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:40:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:40:21,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:40:21,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:40:21,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:40:22,061 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:40:22,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:22 BoogieIcfgContainer [2018-10-22 09:40:22,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:40:22,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:40:22,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:40:22,069 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:40:22,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:40:21" (1/3) ... [2018-10-22 09:40:22,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9b48a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:22, skipping insertion in model container [2018-10-22 09:40:22,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:21" (2/3) ... [2018-10-22 09:40:22,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9b48a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:22, skipping insertion in model container [2018-10-22 09:40:22,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:22" (3/3) ... [2018-10-22 09:40:22,074 INFO L112 eAbstractionObserver]: Analyzing ICFG sum03_false-unreach-call_true-termination.i [2018-10-22 09:40:22,086 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:40:22,094 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:40:22,114 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:40:22,150 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:40:22,151 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:40:22,151 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:40:22,152 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:40:22,152 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:40:22,152 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:40:22,152 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:40:22,153 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:40:22,153 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:40:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-10-22 09:40:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 09:40:22,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:22,180 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:22,183 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:22,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash -942948557, now seen corresponding path program 1 times [2018-10-22 09:40:22,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:22,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:22,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:22,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:22,239 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:22,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:22,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 09:40:22,445 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:22,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:40:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:40:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:40:22,465 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-10-22 09:40:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:22,603 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2018-10-22 09:40:22,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 09:40:22,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-22 09:40:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:22,615 INFO L225 Difference]: With dead ends: 54 [2018-10-22 09:40:22,615 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 09:40:22,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 09:40:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 09:40:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-22 09:40:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 09:40:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-22 09:40:22,665 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 20 [2018-10-22 09:40:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:22,665 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-22 09:40:22,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:40:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-22 09:40:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 09:40:22,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:22,668 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:22,668 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:22,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1650594959, now seen corresponding path program 1 times [2018-10-22 09:40:22,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:22,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:22,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:22,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:22,671 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:23,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:23,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-10-22 09:40:23,279 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:23,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 09:40:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 09:40:23,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 09:40:23,282 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2018-10-22 09:40:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:23,666 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2018-10-22 09:40:23,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 09:40:23,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-22 09:40:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:23,670 INFO L225 Difference]: With dead ends: 67 [2018-10-22 09:40:23,670 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 09:40:23,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-10-22 09:40:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 09:40:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-10-22 09:40:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 09:40:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-10-22 09:40:23,681 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 21 [2018-10-22 09:40:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:23,682 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-10-22 09:40:23,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 09:40:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-10-22 09:40:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 09:40:23,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:23,684 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:23,685 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:23,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash -224500034, now seen corresponding path program 1 times [2018-10-22 09:40:23,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:23,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:23,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:23,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:23,688 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:23,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:23,911 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:23,912 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-10-22 09:40:23,914 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [9], [13], [19], [22], [23], [25], [27], [28], [29], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51] [2018-10-22 09:40:23,966 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:40:23,967 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:40:24,092 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:40:25,117 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:40:25,119 INFO L272 AbstractInterpreter]: Visited 25 different actions 519 times. Merged at 9 different actions 250 times. Widened at 1 different actions 20 times. Found 24 fixpoints after 4 different actions. Largest state had 7 variables. [2018-10-22 09:40:25,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:25,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:40:25,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:25,162 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:40:25,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:25,180 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:25,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:25,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:25,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:25,518 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:25,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:25,546 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:25,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:25,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:25,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:25,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-10-22 09:40:25,620 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:25,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:40:25,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:40:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-22 09:40:25,621 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2018-10-22 09:40:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:25,838 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-22 09:40:25,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 09:40:25,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-10-22 09:40:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:25,842 INFO L225 Difference]: With dead ends: 64 [2018-10-22 09:40:25,842 INFO L226 Difference]: Without dead ends: 50 [2018-10-22 09:40:25,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-22 09:40:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-22 09:40:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2018-10-22 09:40:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 09:40:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-22 09:40:25,857 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 32 [2018-10-22 09:40:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:25,857 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-22 09:40:25,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:40:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-22 09:40:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-22 09:40:25,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:25,861 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:25,862 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:25,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1825773001, now seen corresponding path program 2 times [2018-10-22 09:40:25,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:25,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:25,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:25,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:25,865 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 09:40:26,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:26,224 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:26,225 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:26,225 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:26,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:26,225 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:40:26,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:40:26,242 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:26,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:40:26,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:26,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 09:40:26,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 09:40:26,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:26,549 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:26,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:40:26,568 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:26,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:40:26,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:26,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 09:40:26,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 09:40:26,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:26,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-10-22 09:40:26,788 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:26,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 09:40:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 09:40:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-22 09:40:26,789 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 7 states. [2018-10-22 09:40:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:27,011 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2018-10-22 09:40:27,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 09:40:27,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2018-10-22 09:40:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:27,015 INFO L225 Difference]: With dead ends: 72 [2018-10-22 09:40:27,015 INFO L226 Difference]: Without dead ends: 58 [2018-10-22 09:40:27,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:40:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-22 09:40:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2018-10-22 09:40:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-22 09:40:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-10-22 09:40:27,027 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2018-10-22 09:40:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:27,027 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-10-22 09:40:27,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 09:40:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-10-22 09:40:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 09:40:27,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:27,030 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:27,031 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:27,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash 169512020, now seen corresponding path program 3 times [2018-10-22 09:40:27,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:27,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:27,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:27,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:27,034 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:40:27,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:27,342 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:27,343 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:27,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:27,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:27,343 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:40:27,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:40:27,352 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:40:27,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 09:40:27,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:27,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:40:27,450 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:40:27,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:27,751 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:27,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:40:27,768 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:40:27,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 09:40:27,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:27,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:40:27,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:40:27,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:27,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-10-22 09:40:27,986 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:27,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 09:40:27,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 09:40:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:40:27,987 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 9 states. [2018-10-22 09:40:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:28,258 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-10-22 09:40:28,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 09:40:28,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2018-10-22 09:40:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:28,265 INFO L225 Difference]: With dead ends: 80 [2018-10-22 09:40:28,265 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 09:40:28,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2018-10-22 09:40:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 09:40:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-10-22 09:40:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-22 09:40:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2018-10-22 09:40:28,274 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 56 [2018-10-22 09:40:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:28,275 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2018-10-22 09:40:28,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 09:40:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2018-10-22 09:40:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-22 09:40:28,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:28,276 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:28,277 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:28,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -620393889, now seen corresponding path program 4 times [2018-10-22 09:40:28,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:28,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:28,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:28,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:28,278 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:40:28,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:28,542 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:28,542 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:28,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:28,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:28,543 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:28,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:40:28,551 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:40:28,584 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:40:28,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:28,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:40:28,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:40:29,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:29,061 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:29,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:40:29,080 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:40:29,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:40:29,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:29,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:40:29,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:40:29,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:29,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 20 [2018-10-22 09:40:29,432 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:29,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 09:40:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 09:40:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-10-22 09:40:29,436 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 11 states. [2018-10-22 09:40:30,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:30,168 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2018-10-22 09:40:30,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 09:40:30,168 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2018-10-22 09:40:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:30,170 INFO L225 Difference]: With dead ends: 88 [2018-10-22 09:40:30,171 INFO L226 Difference]: Without dead ends: 74 [2018-10-22 09:40:30,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2018-10-22 09:40:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-22 09:40:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2018-10-22 09:40:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 09:40:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2018-10-22 09:40:30,181 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 68 [2018-10-22 09:40:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:30,183 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2018-10-22 09:40:30,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 09:40:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2018-10-22 09:40:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-22 09:40:30,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:30,185 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:30,186 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:30,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:30,186 INFO L82 PathProgramCache]: Analyzing trace with hash -586887190, now seen corresponding path program 5 times [2018-10-22 09:40:30,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:30,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:30,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:30,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:30,188 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 09:40:30,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:30,410 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:30,410 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:30,411 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:30,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:30,411 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:30,422 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:40:30,422 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:30,505 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 09:40:30,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:30,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 09:40:30,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 09:40:31,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:31,107 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:31,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:40:31,124 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:31,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 09:40:31,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:31,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 09:40:31,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 09:40:31,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:31,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-10-22 09:40:31,423 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:31,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 09:40:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 09:40:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2018-10-22 09:40:31,424 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 13 states. [2018-10-22 09:40:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:31,856 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2018-10-22 09:40:31,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 09:40:31,858 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2018-10-22 09:40:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:31,861 INFO L225 Difference]: With dead ends: 96 [2018-10-22 09:40:31,861 INFO L226 Difference]: Without dead ends: 82 [2018-10-22 09:40:31,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 09:40:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-22 09:40:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2018-10-22 09:40:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-22 09:40:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2018-10-22 09:40:31,872 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 80 [2018-10-22 09:40:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:31,872 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2018-10-22 09:40:31,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 09:40:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2018-10-22 09:40:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-22 09:40:31,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:31,875 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:31,875 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:31,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1435951883, now seen corresponding path program 6 times [2018-10-22 09:40:31,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:31,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:31,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:31,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:31,877 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 138 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 09:40:32,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:32,398 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:32,398 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:32,398 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:32,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:32,399 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:32,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:40:32,416 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:41:01,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 09:41:01,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:41:01,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 138 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 09:41:01,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 138 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 09:41:02,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:02,474 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:41:02,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:41:02,493 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:41:02,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 09:41:02,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:41:02,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 138 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 09:41:02,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 138 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 09:41:03,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:41:03,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 15, 15] total 39 [2018-10-22 09:41:03,389 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:41:03,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 09:41:03,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 09:41:03,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 09:41:03,392 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 15 states. [2018-10-22 09:41:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:41:04,013 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2018-10-22 09:41:04,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 09:41:04,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2018-10-22 09:41:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:41:04,017 INFO L225 Difference]: With dead ends: 104 [2018-10-22 09:41:04,017 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 09:41:04,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 341 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 09:41:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 09:41:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2018-10-22 09:41:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-22 09:41:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2018-10-22 09:41:04,027 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 92 [2018-10-22 09:41:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:41:04,028 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2018-10-22 09:41:04,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 09:41:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2018-10-22 09:41:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-22 09:41:04,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:41:04,031 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:41:04,031 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:41:04,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:41:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash 711143808, now seen corresponding path program 7 times [2018-10-22 09:41:04,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:41:04,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:04,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:41:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:04,034 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:41:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 42 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 09:41:04,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:04,375 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:41:04,375 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:41:04,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:41:04,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:04,376 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:41:04,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:41:04,385 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:41:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:04,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 42 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 09:41:04,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 42 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 09:41:05,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:05,051 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:41:05,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:41:05,075 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:41:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:05,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 42 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 09:41:05,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 42 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 09:41:05,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:41:05,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17] total 32 [2018-10-22 09:41:05,304 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:41:05,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 09:41:05,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 09:41:05,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2018-10-22 09:41:05,307 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 17 states. [2018-10-22 09:41:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:41:06,177 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2018-10-22 09:41:06,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 09:41:06,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 104 [2018-10-22 09:41:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:41:06,190 INFO L225 Difference]: With dead ends: 112 [2018-10-22 09:41:06,190 INFO L226 Difference]: Without dead ends: 98 [2018-10-22 09:41:06,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 399 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 09:41:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-22 09:41:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2018-10-22 09:41:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 09:41:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2018-10-22 09:41:06,215 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 104 [2018-10-22 09:41:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:41:06,215 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2018-10-22 09:41:06,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 09:41:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2018-10-22 09:41:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-22 09:41:06,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:41:06,223 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:41:06,223 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:41:06,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:41:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1090768267, now seen corresponding path program 8 times [2018-10-22 09:41:06,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:41:06,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:06,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:41:06,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:06,231 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:41:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 48 proven. 248 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-22 09:41:06,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:06,639 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:41:06,639 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:41:06,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:41:06,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:06,639 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:41:06,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:41:06,648 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:41:06,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:41:06,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:41:06,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 48 proven. 248 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-22 09:41:06,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 48 proven. 248 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-22 09:41:07,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:07,364 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:41:07,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:41:07,381 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:41:07,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:41:07,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:41:07,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:41:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 48 proven. 248 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-22 09:41:07,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:41:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 48 proven. 248 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-22 09:41:07,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:41:07,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19] total 36 [2018-10-22 09:41:07,574 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:41:07,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 09:41:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 09:41:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 09:41:07,575 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 19 states. [2018-10-22 09:41:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:41:08,929 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2018-10-22 09:41:08,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 09:41:08,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 116 [2018-10-22 09:41:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:41:08,932 INFO L225 Difference]: With dead ends: 120 [2018-10-22 09:41:08,932 INFO L226 Difference]: Without dead ends: 106 [2018-10-22 09:41:08,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 445 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=410, Invalid=2242, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 09:41:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-22 09:41:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-10-22 09:41:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-22 09:41:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2018-10-22 09:41:08,942 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 116 [2018-10-22 09:41:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:41:08,942 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2018-10-22 09:41:08,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 09:41:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2018-10-22 09:41:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-22 09:41:08,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:41:08,944 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:41:08,945 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:41:08,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:41:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2134618390, now seen corresponding path program 9 times [2018-10-22 09:41:08,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:41:08,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:08,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:41:08,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:41:08,946 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:41:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:41:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 54 proven. 315 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 09:41:09,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:09,405 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:41:09,405 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:41:09,406 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:41:09,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:41:09,406 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:41:09,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:41:09,415 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:42:16,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 09:42:16,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:42:17,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:42:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 54 proven. 315 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 09:42:17,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:42:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 54 proven. 315 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 09:42:18,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:42:18,819 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:42:18,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:42:18,839 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:42:19,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 09:42:19,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:42:19,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:42:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 54 proven. 315 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 09:42:19,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:42:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 54 proven. 315 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-10-22 09:42:21,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:42:21,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22, 21, 21] total 57 [2018-10-22 09:42:21,136 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:42:21,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 09:42:21,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 09:42:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 09:42:21,140 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 21 states. [2018-10-22 09:42:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:42:22,114 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2018-10-22 09:42:22,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 09:42:22,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 128 [2018-10-22 09:42:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:42:22,117 INFO L225 Difference]: With dead ends: 128 [2018-10-22 09:42:22,117 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 09:42:22,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 473 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=971, Invalid=4579, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 09:42:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 09:42:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2018-10-22 09:42:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-22 09:42:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2018-10-22 09:42:22,143 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 128 [2018-10-22 09:42:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:42:22,144 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2018-10-22 09:42:22,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 09:42:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2018-10-22 09:42:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-22 09:42:22,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:42:22,150 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:42:22,151 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:42:22,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:42:22,151 INFO L82 PathProgramCache]: Analyzing trace with hash -757359583, now seen corresponding path program 10 times [2018-10-22 09:42:22,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:42:22,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:42:22,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:42:22,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:42:22,154 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:42:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 09:42:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 09:42:22,272 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 09:42:22,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:42:22 BoogieIcfgContainer [2018-10-22 09:42:22,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:42:22,337 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:42:22,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:42:22,338 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:42:22,338 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:22" (3/4) ... [2018-10-22 09:42:22,343 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-22 09:42:22,470 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:42:22,474 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:42:22,475 INFO L168 Benchmark]: Toolchain (without parser) took 121328.94 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 305.7 MB). Free memory was 953.2 MB in the beginning and 1.3 GB in the end (delta: -323.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:42:22,477 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:42:22,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.61 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:22,478 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.29 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:42:22,478 INFO L168 Benchmark]: Boogie Preprocessor took 25.84 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:42:22,478 INFO L168 Benchmark]: RCFGBuilder took 548.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.5 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -125.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:22,480 INFO L168 Benchmark]: TraceAbstraction took 120272.10 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 219.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -219.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:42:22,481 INFO L168 Benchmark]: Witness Printer took 136.57 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:42:22,486 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 312.61 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.29 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.84 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 548.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.5 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -125.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 120272.10 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 219.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -219.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 136.57 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int sn=0; VAL [sn=0] [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=2, loop1=2, sn=0] [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=3, loop1=2, n1=3, sn=0] [L12] unsigned int x=0; VAL [loop1=2, n1=3, sn=0, x=0] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=0, x=0] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=0, x=0] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=2, x=0] [L17] x++ VAL [loop1=2, n1=3, sn=2, x=1] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=2, x=1] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=2, x=1] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=2, x=1] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=4, x=1] [L17] x++ VAL [loop1=2, n1=3, sn=4, x=2] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=4, x=2] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=4, x=2] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=4, x=2] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=6, x=2] [L17] x++ VAL [loop1=2, n1=3, sn=6, x=3] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=6, x=3] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=6, x=3] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=6, x=3] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=8, x=3] [L17] x++ VAL [loop1=2, n1=3, sn=8, x=4] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=8, x=4] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=8, x=4] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=8, x=4] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=10, x=4] [L17] x++ VAL [loop1=2, n1=3, sn=10, x=5] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=10, x=5] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=10, x=5] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=10, x=5] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=12, x=5] [L17] x++ VAL [loop1=2, n1=3, sn=12, x=6] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=12, x=6] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=12, x=6] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=12, x=6] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=14, x=6] [L17] x++ VAL [loop1=2, n1=3, sn=14, x=7] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=14, x=7] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=14, x=7] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=14, x=7] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=16, x=7] [L17] x++ VAL [loop1=2, n1=3, sn=16, x=8] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=16, x=8] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=16, x=8] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=16, x=8] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=18, x=8] [L17] x++ VAL [loop1=2, n1=3, sn=18, x=9] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=18, x=9] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=18, x=9] [L14] COND TRUE x<10 VAL [loop1=2, n1=3, sn=18, x=9] [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=20, x=9] [L17] x++ VAL [loop1=2, n1=3, sn=20, x=10] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=20, x=10] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=20, x=10] [L14] COND FALSE !(x<10) VAL [loop1=2, n1=3, sn=20, x=10] [L17] x++ VAL [loop1=2, n1=3, sn=20, x=11] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. UNSAFE Result, 120.1s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 6.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 500 SDtfs, 90 SDslu, 4898 SDs, 0 SdLazy, 2803 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3097 GetRequests, 2738 SyntacticMatches, 29 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 31 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 98.2s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 2341 NumberOfCodeBlocks, 2341 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 3594 ConstructedInterpolants, 0 QuantifiedInterpolants, 1500744 SizeOfPredicates, 198 NumberOfNonLiveVariables, 2376 ConjunctsInSsa, 416 ConjunctsInUnsatCore, 47 InterpolantComputations, 2 PerfectInterpolantSequences, 3750/9225 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...