./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7b71b458b3f08f188a62c7539b715f43fd7f97d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:52:21,397 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:52:21,400 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:52:21,419 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:52:21,419 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:52:21,420 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:52:21,421 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:52:21,423 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:52:21,425 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:52:21,425 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:52:21,426 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:52:21,427 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:52:21,427 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:52:21,428 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:52:21,429 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:52:21,430 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:52:21,431 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:52:21,433 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:52:21,435 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:52:21,436 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:52:21,437 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:52:21,439 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:52:21,441 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:52:21,441 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:52:21,442 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:52:21,442 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:52:21,443 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:52:21,444 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:52:21,445 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:52:21,446 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:52:21,446 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:52:21,447 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:52:21,447 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:52:21,448 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:52:21,449 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:52:21,449 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:52:21,450 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:52:21,465 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:52:21,465 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:52:21,466 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:52:21,466 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:52:21,467 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:52:21,467 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:52:21,467 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:52:21,467 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:52:21,468 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:52:21,468 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:52:21,468 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:52:21,468 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:52:21,468 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:52:21,469 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:52:21,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:52:21,469 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:52:21,469 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:52:21,469 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:52:21,469 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:52:21,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:52:21,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:52:21,470 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:52:21,470 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:52:21,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:21,471 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:52:21,471 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:52:21,471 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:52:21,471 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:52:21,471 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:52:21,471 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:52:21,472 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 -> Automizer 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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2018-11-28 18:52:21,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:52:21,558 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:52:21,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:52:21,568 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:52:21,569 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:52:21,570 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-28 18:52:21,625 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb3d612f7/1df13af9d54e4bbd83eced3b60fc1476/FLAG7c4c58a1c [2018-11-28 18:52:22,066 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:52:22,066 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-28 18:52:22,073 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb3d612f7/1df13af9d54e4bbd83eced3b60fc1476/FLAG7c4c58a1c [2018-11-28 18:52:22,429 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb3d612f7/1df13af9d54e4bbd83eced3b60fc1476 [2018-11-28 18:52:22,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:52:22,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:52:22,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:22,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:52:22,439 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:52:22,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151a95c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22, skipping insertion in model container [2018-11-28 18:52:22,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:52:22,470 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:52:22,696 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:22,703 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:52:22,724 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:22,743 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:52:22,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22 WrapperNode [2018-11-28 18:52:22,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:22,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:22,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:52:22,745 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:52:22,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:22,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:52:22,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:52:22,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:52:22,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... [2018-11-28 18:52:22,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:52:22,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:52:22,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:52:22,797 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:52:22,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:52:22,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:52:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:52:22,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:52:22,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:52:22,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:52:22,933 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 18:52:22,933 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 18:52:23,185 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:52:23,185 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:52:23,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:23 BoogieIcfgContainer [2018-11-28 18:52:23,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:52:23,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:52:23,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:52:23,191 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:52:23,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:52:22" (1/3) ... [2018-11-28 18:52:23,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f498b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:23, skipping insertion in model container [2018-11-28 18:52:23,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:22" (2/3) ... [2018-11-28 18:52:23,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f498b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:23, skipping insertion in model container [2018-11-28 18:52:23,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:23" (3/3) ... [2018-11-28 18:52:23,197 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_true-unreach-call_true-termination.c [2018-11-28 18:52:23,212 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:52:23,230 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:52:23,255 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:52:23,303 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:52:23,304 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:52:23,304 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:52:23,304 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:52:23,304 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:52:23,304 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:52:23,304 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:52:23,304 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:52:23,305 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:52:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 18:52:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:52:23,357 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:23,358 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:23,360 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:23,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-28 18:52:23,368 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:23,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:23,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:23,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:23,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:23,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:23,634 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 18:52:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:23,784 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 18:52:23,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:23,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:52:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:23,799 INFO L225 Difference]: With dead ends: 35 [2018-11-28 18:52:23,799 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:52:23,803 INFO L631 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 [2018-11-28 18:52:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:52:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:52:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:52:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:52:23,850 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 18:52:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:23,850 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:52:23,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:52:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:52:23,853 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:23,853 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:23,854 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:23,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-28 18:52:23,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:23,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:23,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:23,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:23,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:23,937 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:23,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:23,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:23,941 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 18:52:24,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:24,211 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 18:52:24,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:24,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:52:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:24,214 INFO L225 Difference]: With dead ends: 27 [2018-11-28 18:52:24,214 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:52:24,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:52:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 18:52:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:52:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:52:24,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 18:52:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:24,225 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:52:24,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:52:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:52:24,227 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:24,227 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:24,228 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:24,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-28 18:52:24,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:24,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:24,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:24,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:24,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:52:24,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:24,439 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:24,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:24,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:52:24,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:24,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 18:52:24,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:52:24,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:52:24,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:24,607 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 18:52:24,823 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-11-28 18:52:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:24,929 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 18:52:24,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:24,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 18:52:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:24,933 INFO L225 Difference]: With dead ends: 38 [2018-11-28 18:52:24,933 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:52:24,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:52:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 18:52:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:52:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 18:52:24,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 18:52:24,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:24,943 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 18:52:24,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:52:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 18:52:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:52:24,945 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:24,946 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:24,946 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:24,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:24,947 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-28 18:52:24,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:24,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:24,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:24,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:24,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:52:25,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:25,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:25,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:25,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:52:25,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:25,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:52:25,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:52:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:52:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:25,182 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 18:52:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:25,461 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 18:52:25,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:52:25,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 18:52:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:25,464 INFO L225 Difference]: With dead ends: 32 [2018-11-28 18:52:25,464 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 18:52:25,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 18:52:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 18:52:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 18:52:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 18:52:25,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 18:52:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:25,474 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 18:52:25,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:52:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 18:52:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 18:52:25,476 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:25,477 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:25,477 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:25,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-28 18:52:25,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:25,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:25,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:25,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:25,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 18:52:25,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:25,716 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:25,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:25,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:25,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:25,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 18:52:25,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:25,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 18:52:25,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:52:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:52:25,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:25,892 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 18:52:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:26,117 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 18:52:26,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:26,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 18:52:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:26,122 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:52:26,122 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:52:26,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:52:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 18:52:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:52:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 18:52:26,141 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 18:52:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:26,141 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 18:52:26,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:52:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 18:52:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 18:52:26,146 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:26,147 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:26,147 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:26,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-28 18:52:26,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:26,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:26,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:26,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:26,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 18:52:26,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:26,439 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:26,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:26,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 18:52:26,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:26,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 18:52:26,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:26,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 18:52:26,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:52:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:52:26,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:26,627 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 18:52:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:27,217 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 18:52:27,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:27,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 18:52:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:27,222 INFO L225 Difference]: With dead ends: 76 [2018-11-28 18:52:27,222 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 18:52:27,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:52:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 18:52:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 18:52:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 18:52:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 18:52:27,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 18:52:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:27,239 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 18:52:27,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:52:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 18:52:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 18:52:27,244 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:27,244 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:27,244 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:27,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash -395446193, now seen corresponding path program 4 times [2018-11-28 18:52:27,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:27,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:27,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:27,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:27,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 128 proven. 66 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-11-28 18:52:27,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:27,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:27,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:52:27,592 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:52:27,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:27,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-28 18:52:27,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:27,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-11-28 18:52:27,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:27,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:27,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:27,740 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 14 states. [2018-11-28 18:52:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:28,461 INFO L93 Difference]: Finished difference Result 109 states and 197 transitions. [2018-11-28 18:52:28,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 18:52:28,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2018-11-28 18:52:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:28,464 INFO L225 Difference]: With dead ends: 109 [2018-11-28 18:52:28,467 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 18:52:28,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 18:52:28,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-11-28 18:52:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-28 18:52:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2018-11-28 18:52:28,482 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 96 [2018-11-28 18:52:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:28,482 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2018-11-28 18:52:28,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2018-11-28 18:52:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:52:28,484 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:28,484 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:28,485 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:28,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:28,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2018-11-28 18:52:28,485 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:28,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:28,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:28,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:28,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-28 18:52:28,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:28,891 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:28,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:52:29,104 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-28 18:52:29,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:29,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-28 18:52:29,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:29,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2018-11-28 18:52:29,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 18:52:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 18:52:29,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:52:29,642 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 20 states. [2018-11-28 18:52:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:30,090 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2018-11-28 18:52:30,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 18:52:30,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2018-11-28 18:52:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:30,094 INFO L225 Difference]: With dead ends: 71 [2018-11-28 18:52:30,095 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 18:52:30,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:52:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 18:52:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-11-28 18:52:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 18:52:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2018-11-28 18:52:30,116 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 109 [2018-11-28 18:52:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:30,117 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2018-11-28 18:52:30,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 18:52:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2018-11-28 18:52:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 18:52:30,121 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:30,122 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:30,122 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:30,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 6 times [2018-11-28 18:52:30,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:30,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:30,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:30,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:30,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 127 proven. 275 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-11-28 18:52:30,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:30,412 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:30,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:52:30,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-28 18:52:30,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:30,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-11-28 18:52:30,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:30,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2018-11-28 18:52:30,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 18:52:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 18:52:30,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:52:30,769 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 13 states. [2018-11-28 18:52:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:31,003 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2018-11-28 18:52:31,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:31,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2018-11-28 18:52:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:31,005 INFO L225 Difference]: With dead ends: 68 [2018-11-28 18:52:31,005 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:52:31,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:52:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:52:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:52:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:52:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:52:31,008 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2018-11-28 18:52:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:31,009 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:52:31,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 18:52:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:52:31,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:52:31,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:52:31,755 WARN L180 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2018-11-28 18:52:31,859 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:52:31,859 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:31,859 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:31,860 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:52:31,860 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:52:31,860 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:52:31,860 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-28 18:52:31,860 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-28 18:52:31,860 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-28 18:52:31,861 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 main_~x~0) (<= main_~x~0 5)) [2018-11-28 18:52:31,861 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-28 18:52:31,861 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-28 18:52:31,861 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-28 18:52:31,861 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-28 18:52:31,861 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-28 18:52:31,861 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-28 18:52:31,862 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-28 18:52:31,862 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-28 18:52:31,862 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-28 18:52:31,862 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= fibo_~n |fibo_#in~n|)) (.cse1 (<= |fibo_#in~n| fibo_~n))) (let ((.cse2 (and .cse0 .cse1 (<= 6 |fibo_#in~n|)))) (and (or (and .cse0 (<= 3 |fibo_#t~ret0|) .cse1) (and (<= |fibo_#in~n| 4) .cse0 .cse1) .cse2) (let ((.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|))) (or (and (<= 3 |fibo_#in~n|) .cse3 (<= |fibo_#in~n| 3) .cse4) (and (<= |fibo_#in~n| 2) .cse3 .cse4 (< 1 fibo_~n)) (and (<= 4 |fibo_#in~n|) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) .cse2 (and (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret0| 3))))))) [2018-11-28 18:52:31,862 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-28 18:52:31,862 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-28 18:52:31,862 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-28 18:52:31,863 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-28 18:52:31,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:52:31 BoogieIcfgContainer [2018-11-28 18:52:31,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:52:31,867 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:52:31,867 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:52:31,867 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:52:31,868 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:23" (3/4) ... [2018-11-28 18:52:31,872 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:52:31,880 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:52:31,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:52:31,881 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-28 18:52:31,886 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:52:31,886 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:52:31,886 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:52:31,939 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:52:31,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:52:31,940 INFO L168 Benchmark]: Toolchain (without parser) took 9507.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 947.3 MB in the beginning and 821.6 MB in the end (delta: 125.7 MB). Peak memory consumption was 322.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:31,941 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:31,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.33 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 936.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:31,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.66 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:31,942 INFO L168 Benchmark]: Boogie Preprocessor took 24.48 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:31,944 INFO L168 Benchmark]: RCFGBuilder took 389.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -166.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:31,944 INFO L168 Benchmark]: TraceAbstraction took 8679.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 821.6 MB in the end (delta: 281.6 MB). Peak memory consumption was 348.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:31,946 INFO L168 Benchmark]: Witness Printer took 72.19 ms. Allocated memory is still 1.2 GB. Free memory is still 821.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:31,950 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.33 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 936.6 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 26.66 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.48 ms. Allocated memory is still 1.0 GB. Free memory is still 936.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 389.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -166.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8679.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 821.6 MB in the end (delta: 281.6 MB). Peak memory consumption was 348.2 MB. Max. memory is 11.5 GB. * Witness Printer took 72.19 ms. Allocated memory is still 1.2 GB. Free memory is still 821.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 8.5s OverallTime, 9 OverallIterations, 19 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 197 SDtfs, 207 SDslu, 859 SDs, 0 SdLazy, 842 SolverSat, 262 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 666 GetRequests, 545 SyntacticMatches, 10 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 74 PreInvPairs, 123 NumberOfFragments, 108 HoareAnnotationTreeSize, 74 FomulaSimplifications, 382 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 630 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 1087 NumberOfCodeBlocks, 1040 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1071 ConstructedInterpolants, 0 QuantifiedInterpolants, 230445 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1068 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 3584/4858 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...