./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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/sum_15x0_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 7f140b11074e684b22c263036fee9fde5b4c087a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 10:07:44,293 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:07:44,295 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:07:44,314 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:07:44,315 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:07:44,317 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:07:44,319 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:07:44,322 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:07:44,324 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:07:44,326 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:07:44,326 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:07:44,327 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:07:44,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:07:44,329 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:07:44,331 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:07:44,332 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:07:44,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:07:44,335 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:07:44,337 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:07:44,339 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:07:44,340 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:07:44,341 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:07:44,344 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:07:44,344 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:07:44,345 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:07:44,346 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:07:44,347 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:07:44,348 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:07:44,349 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:07:44,350 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:07:44,350 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:07:44,351 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:07:44,351 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:07:44,351 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:07:44,353 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:07:44,353 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:07:44,354 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:07:44,370 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:07:44,371 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:07:44,372 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:07:44,372 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:07:44,372 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:07:44,372 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:07:44,376 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:07:44,377 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:07:44,377 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:07:44,377 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:07:44,377 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:07:44,378 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:07:44,379 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:07:44,379 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:07:44,379 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:07:44,379 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:07:44,380 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:07:44,380 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:07:44,380 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:07:44,380 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:07:44,382 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:07:44,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:44,383 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:07:44,383 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:07:44,383 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:07:44,383 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:07:44,384 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:07:44,384 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:07:44,385 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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2018-12-31 10:07:44,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:07:44,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:07:44,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:07:44,468 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:07:44,468 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:07:44,469 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-12-31 10:07:44,539 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/148a154f6/74bf300783cf45f39a8f0df9d1a90b13/FLAG5c2b4fee3 [2018-12-31 10:07:45,012 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:07:45,012 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-12-31 10:07:45,019 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/148a154f6/74bf300783cf45f39a8f0df9d1a90b13/FLAG5c2b4fee3 [2018-12-31 10:07:45,369 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/148a154f6/74bf300783cf45f39a8f0df9d1a90b13 [2018-12-31 10:07:45,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:07:45,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:07:45,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:45,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:07:45,382 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:07:45,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f9b7a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45, skipping insertion in model container [2018-12-31 10:07:45,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:07:45,415 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:07:45,627 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:45,632 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:07:45,651 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:45,668 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:07:45,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45 WrapperNode [2018-12-31 10:07:45,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:45,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:45,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:07:45,670 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:07:45,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:45,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:07:45,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:07:45,710 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:07:45,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (1/1) ... [2018-12-31 10:07:45,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:07:45,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:07:45,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:07:45,733 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:07:45,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (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 [2018-12-31 10:07:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:07:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:07:45,906 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-12-31 10:07:45,906 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-12-31 10:07:46,104 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:07:46,105 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:07:46,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:46 BoogieIcfgContainer [2018-12-31 10:07:46,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:07:46,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:07:46,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:07:46,110 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:07:46,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:07:45" (1/3) ... [2018-12-31 10:07:46,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7bb029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:46, skipping insertion in model container [2018-12-31 10:07:46,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:45" (2/3) ... [2018-12-31 10:07:46,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7bb029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:46, skipping insertion in model container [2018-12-31 10:07:46,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:46" (3/3) ... [2018-12-31 10:07:46,114 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0_true-unreach-call_true-termination.c [2018-12-31 10:07:46,124 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:07:46,131 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:07:46,145 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:07:46,180 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:07:46,181 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:07:46,181 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:07:46,181 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:07:46,181 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:07:46,181 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:07:46,182 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:07:46,182 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:07:46,182 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:07:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:07:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:07:46,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:46,206 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:46,208 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:07:46,218 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:46,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:46,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:46,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:46,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 10:07:46,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:46,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:46,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:46,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:46,595 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:07:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:46,741 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 10:07:46,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:46,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:07:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:46,753 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:46,753 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:07:46,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:07:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:07:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:07:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:07:46,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:07:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:46,803 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:07:46,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:07:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:07:46,805 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:46,805 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:46,806 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:07:46,806 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:46,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:46,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:46,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:46,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:46,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:46,909 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 [2018-12-31 10:07:46,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:46,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:47,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:47,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:07:47,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:07:47,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:07:47,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:47,040 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 10:07:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:47,388 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:07:47,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:07:47,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 10:07:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:47,390 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:07:47,390 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:07:47,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:07:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:07:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:07:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:07:47,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:07:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:47,397 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:07:47,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:07:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:07:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:07:47,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:47,399 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:47,399 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:07:47,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:47,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:47,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:47,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:47,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:07:47,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:47,595 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 [2018-12-31 10:07:47,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:47,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:47,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:47,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:07:47,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:47,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 10:07:47,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 10:07:47,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 10:07:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 10:07:47,696 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-12-31 10:07:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:47,948 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 10:07:47,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 10:07:47,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-31 10:07:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:47,952 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:47,952 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 10:07:47,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 10:07:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 10:07:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 10:07:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 10:07:47,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 10:07:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:47,960 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 10:07:47,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 10:07:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 10:07:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 10:07:47,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:47,961 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:47,962 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 10:07:47,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:47,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:47,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:47,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:07:48,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:48,125 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 [2018-12-31 10:07:48,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:48,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 10:07:48,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:48,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:07:48,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:48,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-31 10:07:48,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:07:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:07:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:07:48,236 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2018-12-31 10:07:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:48,754 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 10:07:48,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:07:48,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-31 10:07:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:48,757 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:07:48,757 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 10:07:48,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 10:07:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 10:07:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:07:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 10:07:48,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 10:07:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:48,765 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 10:07:48,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:07:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 10:07:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 10:07:48,767 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:48,767 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:48,767 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:48,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 10:07:48,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:48,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:48,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:48,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:48,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 10:07:48,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:48,955 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 [2018-12-31 10:07:48,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:49,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:49,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:49,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 10:07:49,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:49,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 10:07:49,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:07:49,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:07:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:07:49,062 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-12-31 10:07:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:49,256 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 10:07:49,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:07:49,257 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 10:07:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:49,258 INFO L225 Difference]: With dead ends: 30 [2018-12-31 10:07:49,258 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 10:07:49,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 10:07:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 10:07:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 10:07:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 10:07:49,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 10:07:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:49,266 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 10:07:49,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:07:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 10:07:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 10:07:49,268 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:49,268 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:49,268 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 10:07:49,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:49,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:49,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:49,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:07:49,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:49,497 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 [2018-12-31 10:07:49,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:49,566 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 10:07:49,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:49,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:07:49,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:49,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-31 10:07:49,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:07:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:07:49,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:07:49,617 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2018-12-31 10:07:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:49,852 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 10:07:49,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 10:07:49,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-31 10:07:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:49,855 INFO L225 Difference]: With dead ends: 33 [2018-12-31 10:07:49,855 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 10:07:49,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 10:07:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 10:07:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:07:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-31 10:07:49,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2018-12-31 10:07:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:49,862 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-31 10:07:49,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:07:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-31 10:07:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 10:07:49,864 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:49,864 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:49,864 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2018-12-31 10:07:49,865 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:49,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:49,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:49,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:07:50,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:50,075 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 [2018-12-31 10:07:50,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:50,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-31 10:07:50,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:50,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:07:50,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:50,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-31 10:07:50,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 10:07:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 10:07:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-31 10:07:50,186 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2018-12-31 10:07:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:50,447 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-31 10:07:50,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:07:50,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2018-12-31 10:07:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:50,449 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:07:50,449 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:07:50,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:07:50,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:07:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-31 10:07:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-31 10:07:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-31 10:07:50,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2018-12-31 10:07:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:50,458 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-31 10:07:50,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 10:07:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-31 10:07:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-31 10:07:50,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:50,460 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:50,460 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:50,460 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2018-12-31 10:07:50,461 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:50,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:50,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:50,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:07:50,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:50,782 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 [2018-12-31 10:07:50,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:50,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:07:50,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:50,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-31 10:07:50,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:07:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:07:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:07:50,881 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2018-12-31 10:07:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:51,389 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-31 10:07:51,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:07:51,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-12-31 10:07:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:51,391 INFO L225 Difference]: With dead ends: 39 [2018-12-31 10:07:51,391 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 10:07:51,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:07:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 10:07:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-31 10:07:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-31 10:07:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-31 10:07:51,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2018-12-31 10:07:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:51,399 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-31 10:07:51,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:07:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-31 10:07:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 10:07:51,403 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:51,403 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:51,403 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:51,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2018-12-31 10:07:51,404 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:51,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:51,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:51,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:07:52,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:52,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:52,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:52,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:52,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:52,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:07:52,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:52,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-31 10:07:52,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 10:07:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 10:07:52,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-31 10:07:52,258 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2018-12-31 10:07:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:52,529 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-12-31 10:07:52,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 10:07:52,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-12-31 10:07:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:52,532 INFO L225 Difference]: With dead ends: 42 [2018-12-31 10:07:52,532 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 10:07:52,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:07:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 10:07:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-31 10:07:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-31 10:07:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-31 10:07:52,540 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2018-12-31 10:07:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:52,540 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-31 10:07:52,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 10:07:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-31 10:07:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-31 10:07:52,541 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:52,542 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:52,542 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2018-12-31 10:07:52,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:52,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:52,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:52,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:07:52,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:52,875 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:52,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:07:52,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 10:07:52,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:52,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:07:53,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:53,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-31 10:07:53,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:07:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:07:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:07:53,047 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-12-31 10:07:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:53,372 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-31 10:07:53,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 10:07:53,374 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2018-12-31 10:07:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:53,375 INFO L225 Difference]: With dead ends: 45 [2018-12-31 10:07:53,375 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 10:07:53,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:07:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 10:07:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-31 10:07:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-31 10:07:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-31 10:07:53,386 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2018-12-31 10:07:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:53,387 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-31 10:07:53,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:07:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-31 10:07:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 10:07:53,390 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:53,390 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:53,390 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:53,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:53,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2018-12-31 10:07:53,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:53,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:53,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:53,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-31 10:07:53,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:53,853 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:53,870 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:07:53,918 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:07:53,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:53,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-31 10:07:53,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:53,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-31 10:07:53,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 10:07:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 10:07:53,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-31 10:07:53,981 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-12-31 10:07:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:54,317 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-31 10:07:54,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:07:54,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2018-12-31 10:07:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:54,323 INFO L225 Difference]: With dead ends: 48 [2018-12-31 10:07:54,323 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 10:07:54,324 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:07:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 10:07:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-31 10:07:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-31 10:07:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-31 10:07:54,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2018-12-31 10:07:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:54,333 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-31 10:07:54,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 10:07:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-31 10:07:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-31 10:07:54,338 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:54,338 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:54,338 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2018-12-31 10:07:54,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:54,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:54,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:54,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:54,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-31 10:07:54,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:54,595 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:54,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:07:54,680 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-31 10:07:54,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:54,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-31 10:07:54,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:54,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-31 10:07:54,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 10:07:54,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 10:07:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:07:54,768 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2018-12-31 10:07:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:55,343 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-31 10:07:55,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 10:07:55,345 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2018-12-31 10:07:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:55,347 INFO L225 Difference]: With dead ends: 51 [2018-12-31 10:07:55,347 INFO L226 Difference]: Without dead ends: 47 [2018-12-31 10:07:55,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:07:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-31 10:07:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-31 10:07:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-31 10:07:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-31 10:07:55,356 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2018-12-31 10:07:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:55,356 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-31 10:07:55,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 10:07:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-31 10:07:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 10:07:55,359 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:55,359 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:55,360 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2018-12-31 10:07:55,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:55,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:55,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:55,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-31 10:07:55,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:55,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:55,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:07:55,787 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-31 10:07:55,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:55,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-31 10:07:55,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:55,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-31 10:07:55,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 10:07:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 10:07:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-31 10:07:55,853 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2018-12-31 10:07:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:56,417 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-12-31 10:07:56,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 10:07:56,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2018-12-31 10:07:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:56,419 INFO L225 Difference]: With dead ends: 54 [2018-12-31 10:07:56,419 INFO L226 Difference]: Without dead ends: 50 [2018-12-31 10:07:56,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-31 10:07:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-31 10:07:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-31 10:07:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-31 10:07:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-12-31 10:07:56,427 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2018-12-31 10:07:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:56,428 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-12-31 10:07:56,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 10:07:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-12-31 10:07:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-31 10:07:56,431 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:56,431 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:56,431 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2018-12-31 10:07:56,433 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:56,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:56,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:56,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:56,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-31 10:07:57,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:57,055 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:07:57,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:57,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-31 10:07:57,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:57,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-31 10:07:57,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:07:57,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:07:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:07:57,206 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2018-12-31 10:07:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:57,682 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-12-31 10:07:57,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 10:07:57,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-12-31 10:07:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:57,685 INFO L225 Difference]: With dead ends: 57 [2018-12-31 10:07:57,686 INFO L226 Difference]: Without dead ends: 53 [2018-12-31 10:07:57,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-31 10:07:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-31 10:07:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-31 10:07:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-31 10:07:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-12-31 10:07:57,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2018-12-31 10:07:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:57,694 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-12-31 10:07:57,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:07:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-12-31 10:07:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 10:07:57,697 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:57,697 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:57,697 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:57,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2018-12-31 10:07:57,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:57,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:57,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:57,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:57,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-31 10:07:58,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:58,375 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:58,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:07:58,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:07:58,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:07:58,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-31 10:07:58,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:58,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-31 10:07:58,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 10:07:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 10:07:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-31 10:07:58,533 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2018-12-31 10:07:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:59,003 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-12-31 10:07:59,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 10:07:59,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2018-12-31 10:07:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:59,006 INFO L225 Difference]: With dead ends: 60 [2018-12-31 10:07:59,006 INFO L226 Difference]: Without dead ends: 56 [2018-12-31 10:07:59,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 10:07:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-31 10:07:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-31 10:07:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-31 10:07:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-12-31 10:07:59,016 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2018-12-31 10:07:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:59,016 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-12-31 10:07:59,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 10:07:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-12-31 10:07:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-31 10:07:59,017 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:59,019 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:59,020 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2018-12-31 10:07:59,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:59,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:59,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:07:59,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-12-31 10:08:01,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:01,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-12-31 10:08:01,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:01,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-31 10:08:01,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:01,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-12-31 10:08:02,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:02,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 43 [2018-12-31 10:08:02,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-31 10:08:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-31 10:08:02,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1715, Unknown=0, NotChecked=0, Total=1806 [2018-12-31 10:08:02,123 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 43 states. [2018-12-31 10:08:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:05,871 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-12-31 10:08:05,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-31 10:08:05,873 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 99 [2018-12-31 10:08:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:05,874 INFO L225 Difference]: With dead ends: 63 [2018-12-31 10:08:05,874 INFO L226 Difference]: Without dead ends: 59 [2018-12-31 10:08:05,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 94 SyntacticMatches, 16 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=374, Invalid=5176, Unknown=0, NotChecked=0, Total=5550 [2018-12-31 10:08:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-31 10:08:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-31 10:08:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-31 10:08:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-12-31 10:08:05,884 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2018-12-31 10:08:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:05,884 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-12-31 10:08:05,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-31 10:08:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-12-31 10:08:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 10:08:05,885 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:05,888 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:05,888 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2018-12-31 10:08:05,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:05,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:05,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:05,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 31 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-31 10:08:06,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:06,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:06,338 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:08:06,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:08:06,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:06,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 31 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-31 10:08:06,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:06,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-31 10:08:06,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 10:08:06,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 10:08:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:08:06,503 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 20 states. [2018-12-31 10:08:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:06,949 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-12-31 10:08:06,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 10:08:06,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2018-12-31 10:08:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:06,951 INFO L225 Difference]: With dead ends: 59 [2018-12-31 10:08:06,951 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:08:06,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 10:08:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:08:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:08:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:08:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:08:06,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2018-12-31 10:08:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:06,954 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:08:06,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 10:08:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:08:06,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:08:06,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:08:07,066 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:08:07,066 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-12-31 10:08:07,066 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 15) (<= 15 ULTIMATE.start_main_~a~0)) [2018-12-31 10:08:07,067 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L448 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-12-31 10:08:07,067 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-12-31 10:08:07,068 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-12-31 10:08:07,068 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-12-31 10:08:07,068 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-12-31 10:08:07,068 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-12-31 10:08:07,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:08:07 BoogieIcfgContainer [2018-12-31 10:08:07,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:08:07,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:08:07,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:08:07,072 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:08:07,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:46" (3/4) ... [2018-12-31 10:08:07,076 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:08:07,084 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-12-31 10:08:07,088 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:08:07,088 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-31 10:08:07,132 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:08:07,132 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:08:07,133 INFO L168 Benchmark]: Toolchain (without parser) took 21758.92 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 338.2 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -260.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:07,137 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:07,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.73 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:07,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.48 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:07,139 INFO L168 Benchmark]: Boogie Preprocessor took 22.21 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:07,139 INFO L168 Benchmark]: RCFGBuilder took 372.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -181.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:07,140 INFO L168 Benchmark]: TraceAbstraction took 20964.83 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 190.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -90.3 MB). Peak memory consumption was 100.6 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:07,140 INFO L168 Benchmark]: Witness Printer took 60.79 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:07,146 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.73 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 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 40.48 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.21 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 372.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -181.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20964.83 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 190.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -90.3 MB). Peak memory consumption was 100.6 MB. Max. memory is 11.5 GB. * Witness Printer took 60.79 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 2 procedures, 15 locations, 1 error locations. SAFE Result, 20.8s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 9.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 180 SDtfs, 362 SDslu, 1350 SDs, 0 SdLazy, 2343 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1501 GetRequests, 1108 SyntacticMatches, 16 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 24 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 1929 NumberOfCodeBlocks, 1929 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1896 ConstructedInterpolants, 0 QuantifiedInterpolants, 455408 SizeOfPredicates, 171 NumberOfNonLiveVariables, 2896 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 33 InterpolantComputations, 1 PerfectInterpolantSequences, 5317/9248 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...